WO2025215612A1

WO2025215612A1 - Personal protective equipment, and communication systems therefore

Info

Publication number: WO2025215612A1
Application number: PCT/IB2025/053849
Authority: WO
Inventors: Douglas D. Jensen; James F. POCH; Nicolas W. TREMAIN; Gregory G. Jager
Original assignee: 3M Innovative Properties Co
Current assignee: 3M Innovative Properties Co
Priority date: 2024-04-12
Filing date: 2025-04-12
Publication date: 2025-10-16
Anticipated expiration: 2026-10-12

Abstract

A PPE system is presented that includes an article of PPE that includes a sensor, the sensor configured to sense a status of the article of PPE. The system includes a primary communication system comprising a primary microphone and a primary speaker and a communication component that is configured to receive a communication and broadcast the received communication over the primary speaker. The system also includes a secondary communication system comprising a bone conduction transducer. The system also includes a communication component configured to receive an indication of the sensed status and provide the sensed status to the secondary communication system for broadcast using the bone conduction transducer.

Description

PERSONAL PROTECTIVE EQUIPMENT, AND COMMUNICATION SYSTEMS THEREFORE BACKGROUND Many work environments require the use of personal protection equipment by workers therein. Hearing protection is often needed to protect workers’ hearing in loud environments. Respiratory protective equipment is needed in environments with particulates, noxious fumes or other airborne contaminants are present. Additional protection, such as helmets, glasses, overalls, etc. may also be needed in some environments. SUMMARY A PPE system is presented that includes an article of PPE that includes a sensor, the sensor configured to sense a status of the article of PPE. The system includes a primary communication system comprising a primary microphone and a primary speaker and a communication component that is configured to receive a communication and broadcast the received communication over the primary speaker. The system also includes a secondary communication system comprising a bone conduction transducer. The system also includes a communication component configured to receive an indication of the sensed status and provide the sensed status to the secondary communication system for broadcast using the bone conduction transducer. BRIEF DESCRIPTION OF THE DRAWINGS FIGS.1A-1C illustrate representative configurations of PAPRs in which embodiments herein may be useful. FIG.2 illustrates potential PPE that may be required for a worker in a work environment. FIG. 3 illustrates a schematic of a bone conduction communication system in accordance with embodiments herein. FIG.4 illustrates a PPE communication system in accordance with embodiments herein. FIG. 5 illustrates a method of coordinating operation of multiple communication systems in accordance with embodiments herein. FIGS. 6A-6G illustrate bone conduction transducer placement options in accordance with embodiments herein. FIG. 7 illustrates a method of operating multiple communication systems within a personal area network in accordance with embodiments herein. FIG. 8 is a schematic illustration of a communication environment in accordance with embodiments herein. FIG.9 illustrates a schematic of an example Communication Management System in accordance with embodiments herein. FIG. 10 illustrates a method of transferring communication groups in accordance with embodiments herein. FIG.11 illustrates a method of managing networked communication in accordance with embodiments herein. FIG.12 illustrates a cloud-based communication management system. FIGS.13-14 show examples of mobile devices that can be used in the embodiments shown in previous Figures. FIG. 15 is a block diagram of a computing environment that can be used in embodiments shown in previous Figures. DETAILED DESCRIPTION As used in this description, the following terms have the meanings as indicated: Powered air-purifying respirators generate airflow to the breathing space of a user by means of a fan that draws in air. The air is directed through one or more filters before it is delivered to the user. The volume of air delivered to the user is an important consideration, with minimal volumetric quantities required to support adequate respiration and comfort of the user. Regulatory bodies promulgate various regulations related to PAPRs and typically mandate minimal airflow requirements. Currently, in the United States, NIOSH 42 CFR Part 84 requires loose fitting PAPRs to produce a minimum volumetric air flow of 170 liters. PAPRs are often required in environments where airborne contaminants, aerosols and / or particulates are present that could cause respiratory damage. Active hearing protection includes one or more microphones that receive ambient sound from a user’s surroundings and uses one or more speakers to play it back at a safe level. Active hearing protection devices use electronic circuitry to pick up ambient sound through the microphone and convert them to safe levels before playing it back to the user through a speaker. Additionally, active hearing protection may comprise filtering out undesired sound content, for example reducing the sound of a gunshot while providing human speech at substantially unchanged levels. Some active hearing protection units are level dependent, such that an electronic circuit adapts the sound pressure level. Level dependent hearing protection units help to filter out impulse noises, such as gunshots from surrounding noises, and / or continuously adapt all ambient sound received to an appropriate level before it is reproduced to a user. Active hearing protection units, specifically level dependent active hearing protection units, may be necessary to facilitate communication in noisy environments, or environments where noise levels can vary significantly, or where high impulse sounds may cause hearing damage. A user may need to hear nearby ambient sounds, such as machine sounds or speech, while also being protected from harmful noise levels. FIGS.1A-1C illustrate representative configurations of PAPRs in which embodiments herein may be useful. FIG.1A depicts a typical PAPR 10 being worn by a user 14. PAPR 10 comprises breathing head gear 16 shown disposed on the face of the user 14 creating a breathing space 18 in which filtered air is supplied through a breathing tube 20 for the user to inspire and into which the user can exhale. Breathing head gear 16 may be a breathing mask, hood, helmet, hard-top, or other suitable component having an inlet for filtered air defining a breathing space 18 for the user. PAPR 10 includes a blower/filter unit 22 that is typically attached to the user 14 via a belt 26 secured about the waist of the user 14. Blower/filter unit 22 is designed to be worn by a user in an atmosphere having unwanted respiratory (and potentially other) contaminants. As used herein, the term “blower” may be considered interchangeable with the term “fan” and refers to a mechanical component that is driven by a motor and provides air to a respiratory device. Blower/filter unit 22, in some embodiments, includes a compressor instead of a blower, such that supplied air is forced through the filter. However, while a waist-mounted blower/filtration unit 22 is illustrated in FIG. 1A, it is expressly contemplated that other mounting options are available. FIGS. 1B-1C illustrate other PAPR configurations 50, 70 where a blower/filtration unit 52, 72, in addition to a power source, are head-mounted. FIG.2 illustrates potential PPE that may be required for a worker in a work environment. In addition to a PAPR unit, often a worker needs to wear other PPE. For example, many work environments where a PAPR is needed may also be loud, such that hearing protection is needed. A worker 100 may need to combine multiple articles of PPE to meet different safety requirements. A worker may need to select an in-ear hearing protection option such as active hearing earplugs 112 or passive hearing earplugs 114. A worker may need to select an over-ear hearing protection option such as active hearing protection-enabled earmuffs 122 or passive protecting earmuffs 124. Other hearing protection options may also be available. One or more PAPR configurations 130 may also be available, such as those available illustrated in FIGS. 1A-1C, or other suitable configurations. Additionally, a worker may wear a number of body covering articles as well, such as gloves, overalls, a welding jacket, a clean suit, a heat suit, etc. One important requirement for PPE to work properly is for it to be used properly – for worker 100 to be in compliance with PPE usage requirements. However, this can directly clash with a desire for worker 100 to be able to communicate with coworkers and their environments. Hearing protection, for example, may make it difficult for a user to hear a coworker at a distance. Hearing protection 110 and 120 may be used in combination, either pairing one passive with one active hearing option, or pairing two active hearing protection options, such as described in U.S. Pat. 11,963,849, issued on April 23, 2024, which is incorporated herein by reference in its entirety, for example. However, this drastically reduces an ability to hear clearly. For example, even sound from earmuff speakers may be blocked by either passive 110 or active 120 hearing protection options. Active hearing protection articles may also provide attenuation for external sounds, which works against the ability of an audible indication produced outside the hearing protection article to be heard – for example an alert generated by a PAPR, another PPE device or another non-PPE source. Additionally, many articles of PPE have status or operational information that a user may want to know. A useful life remaining for a PAPR filter, for example, or a use time remaining based on a current battery life, a remaining runtime for the PAPR, a remaining filter-life, etc. Some PAPR units utilize a heads- up display to indicate status information. However, a heads-up display is limited to icons or other visual representations of status information, which may not provide the specificity desired by a user. For example, a ‘remaining battery life’ may be illustrated using a partially filled battery icon. However, knowing that a battery of a PAPR has 20% remaining may not immediately translate into an amount of run time or filter life remaining. Visual indications on a display may also distract a worker from a task at hand. Indicators within the field of view can cause discomfort to a user by being too bright or not visible by being too dark as users move between bright (e.g. outside) to dark (inside) environments. Because of the proximity to the eye which is too close for most users to focus, in-field visual indicators typically are simple indicators generating 'flashes' of light to represent information, which the user must translate to understand the meaning. These in-field- visible indicators also have the drawback of causing additional glare in the user’s field of view. Haptic feedback, or the use of tactile indicators, is another option for providing status information to a wearer of PPE. However, tactile indicators need good mechanical coupling between the source of the vibration and the users’ skin, often hampered by clothing and other PPE. Additionally, the information content of tactile indicators is low, so full-information-content messages usually must come from another source leaving tactile indication useful as a means of ‘attention getting’ to tell the user to ‘look somewhere else’. Additionally, wearable PPE is often bulky or made of thick material. Articles such as gloves may limit dexterity of a user, and other wearable PPE, such as overalls, welding jackets, clean suits, heat suits, etc., may inhibit the ability of a user to feal a tactile indication. Some hearing protection devices may capture, process and provide ambient sound for a user, such that ambient audible alerts may be used. However, communication systems that include hearing protection devices are often also used for worker 100 to communicate with other workers. A system is desired that allows for native language audible notifications to be provided to worker 100 in such a way that worker 100 can detect the notification through PPE. For example, it is desired that a notification communication system be separate from a hearing protection communication system, or a PAPR communication system such that notifications may be presented clearly, reliably and distinctly from other provided sound. Embodiments herein add an independent communication system to a PPE system for a user that is configured to receive and broadcast information separately from a primary communication system. For example, a PAPR and / or hearing protection article may have a communication system that facilitates worker- to-worker communication, media broadcasting, etc. The independent communications system herein, in some embodiments, is used solely for providing device-related alerts and / or responses to user-initiated queries. However, communication systems herein may be used to convey other information as well. Because many articles of PPE partially or completely occlude the ear canal, systems and methods herein rely on bone conduction technology to communicate in a way that bypasses the ear canal to provide understandable and ‘audible’ information. In many situations, information is provided by a bone conduction communication system while a second communication system is also active – e.g. the bone conduction communication system provides information ‘over,’ or ‘simultaneously with’ a broadcast from a separate communication system. . By informing users of a device status using a bone conduction-based communication system, the user may be able to continue a task without diverting their eye-ball attention from their work to a PPE display or continue to hear a conversation without interruption. Using a different method may help a worker better maintain situational awareness (e.g. peripheral visual awareness, for example awareness of nearby moving vehicles or other workers). Such a system better enables a user to become aware of an alarm or notifications from the PPE, rather than relying on buzzes or beeps or flashes, and additionally allows users to hear the information in their selected native language. Introducing a separate communication system, instead of integrating notification provision through an existing PPE system (e.g. routing PAPR-related alarms to a speaker of a hearing protection device) provides the additional benefit of device compatibility. Many hearing protection devices are incompatible with PAPR systems because of the size of earmuffs / available space within a face mask or under a headtop of a PAPR system. Because bone conduction systems have a relatively small physical space requirement, they may be compatible with a wider array of systems. This allows a user more flexibility in selecting PPE articles to suit their comfort and environmental requirements without sacrificing the ability to easily determine and receive status information about selected PPE articles. FIG. 3 illustrates a schematic of a bone conduction communication system in accordance with embodiments herein. In short, a bone conduction speaker system works by transmitting sound vibrations directly to the bones of the skull, bypassing the outer and middle ear. A transducer, typically a small vibrating element or a piezoelectronic transducer coverts audio signals into mechanical vibrations. The transducer is placed in contact with the skull of a user, typically near the temporal bone or behind the ear. The vibrations are directly transmitted to the bones of the skull, wherein they travel through the skull, which acts as a conductor, until they reach the inner ear. The vibrations stimulate the cochlea, the auditory sensory organ in the inner ear, which then converts the vibrations into electrical signals. The electrical signals are transmitted through the auditory nerve to the brain, where they are interpreted as sound. Referring to FIG. 3, in embodiments herein, bone conduction system 212 is communicably coupled to a device 216. The device 216 may, in some embodiments, be one of several articles of PPE 216. For example, a PAPR 216 may provide device status information to bone conduction element 212 to provide a user. A hearing protection device 216 may also provide device status information, such as run time remaining for a power source, such as a battery, a fuel cell, etc. Device 216 may also, in some embodiments, include a computing device associated with a wearer of bone conduction element 212, such as a smartphone, a computer, a wearable device such as a smart watch, a physiological sensor, etc. In some embodiments, device 216 may include a machine or equipment the user is monitoring or interfacing with. Device 216 may also, in some embodiments, refer to a computing system associated with another user, for example a computing device or PPE article worn by a supervisor. Device 216 may include any suitable device separate from bone conduction element, such that bone conduction element 212 can receive information from device 216 for communication to a user. As illustrated in FIG.3, communication can be bidirectional, in some embodiments, such that a bone conduction communication system 212 receives an indication from a wearer (e.g. a question “how much filter time is remaining?”), provides the indication to device 216, and receives an answer from device 216 (e.g. “15 minutes remaining”). Bone conduction element 212 includes a bone conduction transducer 298. In embodiments herein, bone conduction element 212 further includes a transceiver 320 having a wireless communication unit 322. The transceiver 320 may receive and transmits signals. Bone conduction-based communication system 212 may be configured to operate in a half-duplex mode or a full duplex mode depending on ambient noise. However, because bone conduction communication system 212 is independent of a main communication system of a user, bone conduction system may, in some embodiments, operate in either full or half duplex mode using the wireless communication unit 322 when communicating with the wireless communication unit 144 of device 216. For example, the transceiver 320 transmits and receives signals to and from a communication controller transceiver 326 in the communication controller 262 via any suitable wireless communication protocol, such as BLUETOOTH®, infra-red, Zigbee™, near field communication (NFC), WiFi, etc. It is understood that implementations are not limited to only these technologies and that any wireless communication technology suitable for short-range or medium-range communications can be used. In some embodiments, bone conduction communication system 212 also includes processing circuitry 328 having a processor 330 and a memory 332. The memory 332 is in electrical communication with the processor 330 and has instructions that, when executed by the processor 330, configure the processor 330 to receive electrical signals corresponding to mechanical vibrations received from the bone conduction transducer 298 such as might occur when the wearer speaks. In one embodiment, bone conduction communication system 212 further includes an amplifier 334 and a power source 336 in communication with the processing circuitry 328, the transceiver 320, and the amplifier 334. The power source may be a battery, inductive power source or any other device capable of powering the electronic components of the bone conduction communication system 212. The power source may be a rechargeable power source. A rechargeable power source may include a recharging component, e.g. a solar or triboelectric charging component, etc. The power source may be single-use or rechargeable batteries, in some embodiments. In one embodiment, the amplifier 334 amplifies the signal received by transceiver 320 to stimulate, i.e., drive, the bone conduction transducer 298, allowing the transducer to vibrate in accordance with the signal so that the wearer can hear the audio via bone conduction. In other words, the amplified signal is converted to mechanical vibrations, which are passed through the wearer's skull bones to the inner ear. Although processing circuitry 328, amplifier 324 and transceiver 320 are shown as separate elements, it is understood that one or more of these elements can be implemented in a single physical package. In addition to a traditional processor and memory, processing circuitry 328 may include integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry). Processing circuitry 328 may comprise and/or be connected to and/or be configured for accessing (e.g., writing to and/or reading from) memory 332, which may comprise any kind of volatile and/or non- volatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory). Such memory 332 may be configured to store code executable by control circuitry and/or other data, e.g., data pertaining to communication, e.g., configuration and/or address data of nodes, etc. Processing circuitry 328 may be configured to control any of the methods described herein and/or to cause such methods to be performed, e.g., by processor 330. Corresponding instructions may be stored in the memory 332, which may be readable and/or readably connected to the processing circuitry 328. In other words, processing circuitry 328 may include a controller, which may include a microprocessor and/or microcontroller and/or FPGA (Field-Programmable Gate Array) device and/or ASIC (Application Specific Integrated Circuit) device. It may be considered that processing circuitry 328 includes or may be connected or connectable to memory, which may be configured to be accessible for reading and/or writing by the controller and/or processing circuitry 328. Of note, although the embodiments described above refer to the processing circuitry 328, the amplifier 334, the transceiver 320 and the power supply 336 as being included in bone conduction communication system 212, it is contemplated that these elements may arranged in other ways. For example, the processing circuitry 328, the amplifier 334, the transceiver 320 and the power source 336 could be included in an enclosure that is separate from the bone conduction unit, and electrically coupled to the bone conduction communication system 212 by a wire or other signal carrying medium sufficient to drive the bone conduction transducer(s) 298. In the case where the bone conduction unit will only receive signals from the communication controller 262 in device 216, i.e., unidirectional operation only, the processing circuitry 328 is optional and can be omitted. In one embodiment, the communication controller housing 222 includes a communication controller 262 that includes processing circuitry 338 having a processor 340 and a memory 342. The memory 342 is in communication with the processor 340 and stores instructions that, when executed by the processor 340, configure the processor 340 to provide communications between the communication controller 62 and other devices such as the bone conduction communication system 212. The communication controller 262 also includes a communication controller transceiver 326 having a wireless communication unit 344. The communication controller transceiver 326 wirelessly receives and transmits signals and is operable in a half- duplex mode or a full duplex mode. In one embodiment, the communication controller transceiver 326, via the wireless communication unit 344 transmits and receives signals to and from the bone conduction element transceiver 320. In one embodiment, the communication controller transceiver 326 also wirelessly receives audio signals from a microphone within the device 216 for transmission to a central command station or third party. For example, the communication controller transceiver 326 transmits and receives signals to and from a transceiver 326 in the bone conduction transceiver 320 via a wireless communication technology such as BLUETOOTH®, infra-red, Zigbee™, near field communication (NFC), WiFi, etc. Further, the communication controller 262 includes a power source 346 in communication with the processing circuitry 338 and the communication controller transceiver 326. In one embodiment, the power source is a battery, it being understood that any suitable arrangement for supplying power to drive the electronic components in the communication controller 262 can be used. In addition to a traditional processor and memory, processing circuitry 338 of device 216 may include integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry). Processing circuitry 338 may comprise and/or be connected to and/or be configured for accessing (e.g., writing to and/or reading from) memory 342, which may comprise any kind of volatile and/or non- volatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory). Such memory 342 may be configured to store code executable by control circuitry and/or other data, e.g., data pertaining to communication, e.g., configuration and/or address data of nodes, etc. Processing circuitry 138 may be configured to control any of the methods described herein and/or to cause such methods to be performed, e.g., by processor 340. For example, memory 342 may control executable code that causes processor 340 to obtain a device status information when queried. Corresponding instructions may be stored in the memory 342, which may be readable and/or readably connected to the processing circuitry 338. In other words, processing circuitry 328 may include a controller, which may include a microprocessor and/or microcontroller and/or FPGA (Field-Programmable Gate Array) device and/or ASIC (Application Specific Integrated Circuit) device. It may be considered that processing circuitry 328 includes or may be connected or connectable to memory, which may be configured to be accessible for reading and/or writing by the controller and/or processing circuitry 338. FIG. 3 illustrates one example embodiment of a bone conduction communication system 212 in communication with another device 216. However, it is expressly contemplated that embodiments herein may be applicable to other arrangements. For example, while bidirectional communication is illustrated, it is expressly contemplated that only unidirectional communication is possible from device 216 to bone conduction communication system 212. Other variations are also possible. Sound received through bone conduction communication system 212 may be perceived differently by the user than sound produced by a PPE speaker. The sound localization may cause sound produced by bone conduction to be perceived as coming from within the user’s head. This is because the sound vibrations are transmitted directly to the inner ear through the skull bones, instead of the normal pathway of sound entering through the outer and middle ear. The sound quality may also be different from that of a traditional speaker as the sound may feel more “internal” or “vibrational” when compared to air-conducted sound. Additionally, tonal balance may be different. For at least some users, it may be possible to easily detect that a received communication is delivered through the bone conduction system, making it easier to identify and focus on the communication provided using bone conduction communication system 212. However, it is expressly contemplated that other methods or mechanisms may be used to assist a user in identifying a source of an incoming communication. For example, a default volume of the bone conduction communication may be selected to be different from a PPE communication system. The default volume may be selected based on a detected volume of the PPE communication system, e.g. received from memory 342 of a PPE device 216, or from another source. A user is more likely to focus on a louder sound – so in some embodiments the bone conduction communication system operates at a volume that is greater than a volume of the PPE communication system, or to another sound or communication system. The bone conduction communication system may also operate using a unique vocal pattern. For example, the user may be able to select a “voice” that is used by the bone conduction communication system 212. Systems and methods herein provide advantages over traditional PPE alerting and communication systems. For example, using a separate bone conduction communication system allows for a user to use passive hearing protection and still receive audible information. Having a separate bone conduction communication system in place may also allow for a user to, using a primary speaker system, make or receive phone calls or listen to movement. Allowing for workers in loud environments to maintain communication with each other while leaving hearing and respiratory protection intact (e.g. earmuffs still covering the ears, face shield sealed to the face) may increase PPE usage compliance, improving worker health and safety. Additionally, by providing alerting information in a recognizable and audible format allows for a user to receive more detailed and specific information in their native language. While icons may be language agnostic, it is an abbreviation that the user must recognize, translate and understand. By hearing the condition described in words in the language they are most comfortable understanding, this reduces the burden of training users as well as improves the confidence of users in understanding how their system works; both of which lead to users being more psychologically comfortable and better able to focus on their job’s duties. Because the size and complexity of displays are limited, they may be limited in providing more detailed information useful to a user. For example, a conventional display may have a ‘battery’ gauge that indicates one-quarter/one-half/three-quarters/full rather than the ability to speak the actual runtime which is remaining. Embodiments herein provide a user access to more detailed information either as an alert triggered by a threshold, or in an ‘on-demand’ format in response to a user-input triggering a retrieval of information. Further, by not consuming the user’s main sensory input (visual), this audible information enables users to continue with their task by requesting the device ‘speak’ its status. While a bone conduction communication system 212 may, in some embodiments, be used only for providing alert or user-requested information, it is expressly contemplated that it may be used for other communications. Because respiratory protection must cover the mouth, this attenuates and distorts speech. In addition to the mouth covering, many forms of respiratory PPE also cover the entire face with an impact resistant shield adding another layer of attenuation and distortion to the spoken voice. These barriers interfere when one user speaks to another. Adding hearing protection to the listener in the conversation makes it very difficult. A bone conduction communication system 212 may be used for some forms of communication as well. For example, a user may select to use a bone conduction communication system 212 for taking phone calls. However, it may be preferable, in some embodiments, to limit the use of bone conduction communication system 212 to a secondary communication system, particularly when in combination with head-mounted PAPR or hearing communication systems, as battery life, and processing power, are more limited. FIG. 4 illustrates a PPE system in accordance with embodiments herein. PPE system 400 illustrates a primary communication system 410, a secondary communication system 420, and a powered air-purifying respirator (PAPR) 450. However, while a PAPR 450 is illustrated in FIG.4, it is expressly contemplated that PPE system 400 may include additional PPE, alternative PPE, or other devices that operate similarly within PPE system 400. PAPR 450 includes a motor 458 (e.g. an AC or DC electric motor) that powers a fan 456. Fan 456 forces air through filter 454 to a respirator mask 452. As described above, there are many possible configurations for motor 458, fan 456, filter 454 and respirator mask 452 – for example with some seated around a user’s waist, or the user’s back, or all part of a head-mounted system. PAPR 450 also includes a status detector 462 capable of detecting a status of one or more components of PAPR 450. A fan 456 is illustrated as an example mechanism for supplying air. However, it is expressly contemplated that other air sources may be suitable for some embodiments. For example, fan 456 may be an axial or centripetal fan. Fan 456 may be replaced by a supplied air source, such as a compressor, for example, in some embodiments. A PAPR system may include multiple status detectors 462, such as a sensor 462 configured to detect a remaining power level of a power source 459 (e.g. a battery, fuel cell, etc.), which may be indicative of a remaining runtime for motor 458, or a sensor 462 configured to measure a pressure drop across filter 454, which may be indicative of filter loading. As used here, the term “power level” is an approximation of the state of charge of a battery or other power cell. Status detector 462 may also communicate with other sensors associated with a wearer of PAPR 450 or located in an environment around PAPR 450. For example, a temperature or humidity sensor remote from PAPR 450 may communicate an ambient temperature and / or humidity. A status evaluator 464 may, based on the received status signal, determine whether or not an alert is needed. For example, if a remaining battery level falls below a threshold, status evaluator 464 may determine that a “low battery” alert is needed. Status evaluator 464 may compare a status signal to a threshold, e.g. battery level above or below 30%, to a threshold rate of change, e.g. a rate of battery usage. The threshold may be set by a PAPR manufacturer, a user of PPE system 400, a supervisor of the user, or another suitable source. Status evaluator 464 may retrieve a threshold from a datastore 470 which may be stored locally on a memory of PAPR 450, locally on a controller 480 associated with PPE system 400, or remotely, retrieved using a suitable wireless protocol. Status evaluator 464 may retrieve alert thresholds 474 to compare against a received status indicator, for example. Status evaluator 464 may retrieve past alerts 472 for consideration. For example, if a low battery alert was provided previously, a second threshold may be used to determine that a second alert (e.g. to be delivered at a louder volume, changing a status light from yellow to green, etc.) is appropriate. When an alert is needed, alert generator 466 generates the alert. The alert may include a visual alert – e.g. changing a status light indicator from green to yellow or red, or providing a text-based alphanumeric indication. The alert may also, or alternatively, include an audible alert – either a sound or a voice-delivered alphanumeric indication. The alert may also, or alternatively, include a haptic feedback indication such as a vibration. In embodiments herein, at least some alerts are provided by a secondary communication system 420. The alerts, in some embodiments, may be provided in addition to a primary alert mechanism. For example, if an alert for PAPR 450 is designed to be delivered by changing a status light indicator, or by providing an icon on a display, embodiments herein may also provide the alert through the secondary communication system 420. In some embodiments, the alert is provided by secondary communication system 420 instead of using the default alert mechanism of the PAPR 450. Alert generator 466 may retrieve a communication preference 476 from datastore 470. The communication preference 476 may indicate whether an alert should be given using a default alerting method set by a manufacturer of PAPR 450, an alert method set by controller 480 based on available communication systems 410, 420, or another user-dictated preference. Datastore 470 may include other information 478. Other information 478 may include information about PAPR 450, historic received sensor readings, or other information that may be requested by a user. Described above are some example alert scenarios for a PAPR system 450. However, it is expressly contemplated that these are provided as examples only and that other system status updates and alerts may be provided. Additionally, as noted previously, PAPR 450 is illustrated as one example article of PPE that could generate an alert. Additional PPE may be part of system 400, for example a self-contained breathing apparatus, a hearing protection device, a PPE control or routing device (e.g. a system control unit (SCU), which may manage communication using multiple radios and / or multiple radio channels, or a human-interface device containing a Push-to-Talk device (PTT)) switch and / or other user interface functionality, or another electronically powered PPE device capable of generating and communicating an alert for provision to a user. A PPE system 400 may have a number of possible primary communication systems 410. For example, a PAPR 450 may have a microphone and / or speaker associated with a respirator mask 452. If a user is wearing an active hearing protection device, the microphone and / or speaker of the active hearing protection device may be used. U.S. Pat.11,744,739, issued on September 5, 2023, incorporated by reference herein, describes some potential examples of systems and methods that can be used by a controller 480 of system 400 to select which microphone 402 and speaker 404 should be used for a primary communication system 410. For example, PPE system 400 may include PAPR 450, an over-ear active hearing protection device and a pair of in-ear active hearing protect devices. Controller 480 may determine that the active hearing protection devices will make it difficult for a user to hear alerts or communications provide by a speaker of the PAPR 450 and select a speaker and microphone from one of the hearing protection devices. Speaker 404 and microphone 402 may belong to the same device, e.g. both being associated with the in-ear active hearing protection device, or from different devices. For example, the speaker 404 of the in-ear protection device may be selected, as this is speaker most likely to be heard by the user of system 400, but the microphone 402 of the over-ear hearing protection device may be used based on a microphone quality. Primary communication system 410 is the communication system used for regular communication. As described herein, ‘regular communication’ includes communication between a user of PPE system 400 and PPE systems associated with other users in a workspace over radio communication, walkie-talkie communication, wireless communication protocols, etc. In some embodiments, regular communication includes communication received over a cellular network, for example facilitated by a cellular phone associated with a user of PPE system 400. In some embodiments, regular communication covers all communication intended by a user for transmission to another user, e.g. communication to be communicated to a receiving unit outside of PPE system 400. Primary communication system 410 receives speech from a user using microphone 402 and broadcasts received communication using speaker 404. In some embodiments, primary communication system 410 includes a sound processing unit 406 which may process incoming sound. For example, quieter sounds may be amplified, louder sounds may be reduced, background noise may be filtered out. In some embodiments, sound processing unit 406 applies a level dependent hearing function to incoming sounds. Sound processing unit 406 may apply sound processing algorithms in a number of ways. For example, sound processing may occur at either, or both of the transmitting or receiving ends of a transmission. Reducing high ambient sound, may reduce the need for noise cancellation at the ‘listening end’ (e.g. the bone conducting transducer end) of a voice conversation. However, in some embodiments, systems herein may algorithmically improve the voice information received from the ‘speaking end’ of a voice communication system to increase intelligibility without affecting the tonal quality of the ‘listening end’ may be hearing through their secondary audio system. Prior to be sent to the ‘listening end’, some embodiments of voice communication systems herein place noise cancellation or voice improvement algorithms at the ‘speaking end’ prior to being transmitted to the ‘listening end’. Primary communication system 410 may include other functionality 418. For example, primary communication system 410 may receive sound from other sources using other functionality 418, such as music from a music streaming module or a memory associated with PPE system 400, AM/FM radio from a radio transceiver, etc. Communication manager 410, one embodiment of which is described in greater detail in FIG.9, may include one or more communication components, which may be wired or wireless. For example, received communications from other users’ PPE may be received directly by primary communication system 410, through a radio or push-to-talk device (not shown in FIG. 4), using any suitable wired or wireless protocol. Example wired protocols may include analog communication, SPI, I2C, etc. In embodiments herein, PPE system 400 also includes a secondary communication system 420. Secondary communication system 420, in embodiments here, operates independently of primary communication system such that communications provided over secondary communication system 420, when provided, are broadcast, or otherwise provided, over, or interrupt, communications provided through the primary communication systems 410. One example type of communication provided by secondary communication system 420 includes alerts generated by alert generator 466. Secondary communication system 420 may also receive queries from a user, using microphone 426. Sound routing unit 416 may parse communication received by microphone 426 to determine whether a query was received and determine what information to retrieve. For example, speech routing unit 416 may only parse a communication from a user if a wake word is detected, such as “Hey PAPR” or another suitable identifier that a query is being provided by a user. Sound routing unit 416 is illustrated as part of primary communication system 410. In some embodiments, microphone 402 and microphone 426 are separate devices that may be simultaneously operating, processing power can be conserved by waiting until a wake word is detected to do additional parsing of a received indication to detect the contents of a user query. However, in some embodiments, microphone 402 and microphone 426 are the same microphone. Sound routing unit 416 may, in such embodiments, determine how a detected user speech should be treated. For example, until a wake word is detected, received user speech may be treated as intended for communication through primary communication system 410. For example, a user stating “this PAPR is running on low battery” may, because no wake word was detected, be routed through primary communication system 410 and transmitted to an intended listener (e.g. as described below with respect to FIG.9). Secondary communication system may only be actuated when the wake word is detected. If, instead, processing unit detects the wake word (e.g. “Hello PAPR” or another suitable phrase), the detected speech following the wake word is routed for processing through secondary communication system 420. In some embodiments, detected speech is routed by sound routing unit 416 through either primary communication system 410 or secondary communication system 420, and not both. For example, a user stating “Hello PAPR, is this PAPR running on low battery?” would not be transmitted outside of PPE system 400 using communication manager 412. Instead, because the wake word was detected, the speech is instead provided to parsing unit 414 which parses the query such that query generator 415 can generate a query. For the illustrated example, query generator 415 may generate a query for datastore 470, for example past alerts 472, to determine whether or not a “low battery” alert was previously generated. In some embodiments, query generator 415 may generate a query for status detector 462 and / or status evaluator 464, to receive a current status – e.g. a current battery power level remaining. The query may also be generated for an information source outside of the PPE system 400, in some embodiments, for example in response to user questions such as “[wake word] what is the current score of the Twins game?” or “[wake word] what is the weather forecast for today?” Communication component 422 may facilitate communicating and receiving responses to generated queries. Received query responses may be provided to the user through transducer 424. Transducer 424, in embodiments herein, is a bone conduction transducer which generates sound vibrations which are intended to be, when the transducer is in sufficient contact with the user’s skull, transmitted through the user’s skull to the inner ear’s cochlea, bypassing the outer and middle ear. In situations where transducer 424 is actively producing vibrations at the same time that speaker 404 is broadcasting speech, some embodiments herein adjust a relative volume of the provided communications. For example, a volume of speaker 404 may be reduced, and / or a perceived volume of the generated sound vibrations may be increased, such that the sound vibrations are perceived as louder than the broadcast speech. This may be helpful to draw the user’s attention to the communication from secondary communication system 420, as the brain generally focuses on louder communications. However, it is expressly contemplated that other techniques may be used to focus a user’s attention on, or otherwise make distinctive, the sound vibrations from transducer 424. Communication component 422 is also configured to receive alerts from alert generator 466 and provide those alerts to transducer 424. Secondary communication system 420, in embodiments herein, includes a mounting mechanism 428 for mounting the transducer 424 relative to a user’s skull. Mounting mechanism 428 may mount a transducer 424 such that an amount of pressure is applied to ensure good contact with the user’s skull, but not so much pressure as to cause discomfort. The mounting mechanism 428 may mount the transducer in any suitable position on a user’s skull such that sound vibrations are audible. Positioning may also vary depending on the PPE combination required. For example, the area anterior to the ear canal may be a good position as far as audio quality is concerned, but this area may be unavailable if over-ear hearing protection is required. Additionally, it is noted that the presence of hair may reduce the quality of sound, therefore a mounting position may be in a position where hair is generally not present. Embodiments herein include a mounting mechanism 428 in a position that is not likely to interfere with necessary components of PPE system 400 and where adequate pressure can be maintained to ensure good mechanical coupling to the skull. Convenient locations for equipment such as PAPR headtops are the headband used to secure the headtop to the skull and the suspension straps which support the weight of the headtop. Placement of the transducer in the headband superior to the ear canal, via the headband is a location not likely to interfere with other PPE. Other positions are expressly contemplated. PPE system 400 may include other functionality 436 in addition to that described. Other functionality 436 may be provided by other articles of PPE or other devices associated with system 400. For example, a user input mechanism 434, separate from microphone 402, 426 may be used to communicate a user query to PPE system 400. For example, any article of PPE, an SCU, and / or a PTT may have a separate user-input mechanism 434 which could be used to actuate a parsing unit 414 instead of a wake word. Controller 480 is illustrated as a separate component in PPE system 400. However, it is expressly contemplated that, in some embodiments, controller 480 may be part of PAPR 450, or part of either primary or secondary communication system 410. However, controller 480 may also be part of a separate device (not shown) within PPE system 400. For example, U.S. Pat. 11,744,739, issued on September 5, 2023, incorporated herein by reference in its entirety, describes the use of a Personal Area Network. Some embodiments herein incorporate controller 480 into the device generating the Personal Area Network. In some embodiments, controller 480, in response to a user input received from a user input mechanism 434, from microphone 402, or from microphone 426, changes a setting of a component of one or more articles of PPE system 400. For example, a volume of a speaker could be adjusted, or a fan level of a PAPR may be altered. Further, while FIG.4 illustrates one example configuration of functional components of a PPE system 400, it is expressly contemplated that this is for illustrative purposes only, and that other suitable configurations are possible. For example, communication component 422, parsing unit 414 and / or query generator 415 may be incorporated into a controller 480, or into a device containing controller 480. Similarly, status evaluator 464 and / or alert generator 466 may be incorporated into controller 480, or into either of communication systems 410, 420. Controller 480 may be incorporated into any of PAPR 450, or any device that forms part of primary or secondary communication systems 410, 420. Other configurations are expressly contemplated. FIG. 5 illustrates a process of coordinating operation of multiple communication systems in accordance with embodiments herein. As described in embodiments herein, a user may wear multiple articles of PPE that provide a number of different communication options. In accordance with embodiments herein, at least two communication systems may operate simultaneously, such that communication may be provided to a user through two different communication systems. Method 500 illustrates one example process of such operation. The primary and secondary communication systems may be similar to those described in FIG. 4, however it is expressly contemplated that the process of FIG.5 may be utilized with different communication systems. In block 510 a primary communication system 510 is actuated. Actuation of a primary communication system may take place when a user turns on an article of PPE or adds a new article of PPE. For example, when a user first turns on an article of PPE, the default communication settings may be used as a primary communication system. However, in some embodiments, a personal area network controller may detect article(s) of PPE worn by a user and select a combination of microphone and speaker to use for a primary communication system – for example based on detected PPE (e.g. selecting an in-ear microphone when both in-ear and over-ear hearing protection are present), based on available microphone / speaker quality, based on another parameter, or based on communication defaults or user settings. Once actuated, the primary communication system is responsible for transmitting communications between the wearer of the article(s) of PPE and other individuals using any suitable wired, wireless or cellular networks. In block 520, a communication is received. The communication received is accompanied by an indication that it is not for delivery through the primary communication system. For example, an identity of the source of the communication, e.g. that the communication was generated by a PAPR alert generator, for example, may indicate that the communication should be routed to the secondary communication system instead of the first communication system. Or, in some embodiments, a set of communication protocols may be designated for routing to the primary communication system, and communication received over a different protocol may indicate that routing through the secondary communication system is appropriate. In some embodiments, the same communication protocol is used for both the primary and secondary communication system, however communication designated for either primary, secondary or both may be indicated through encoding, or by a channel or band used for the transmission. In block 530, based on the indication, the received communication is broadcast using a second communication system that differs at least in part from the first communication system. For example, the second communication system may include a bone conduction transceiver that is used exclusively by the second communication system. It is expressly contemplated that a first communication (e.g. a conversation between PPE users) over the primary communication system may be taking place while a second communication is broadcast using the secondary communication system, in some embodiments herein. The broadcast over the secondary communication system may be configured such that it is perceivable by the user as separate from the broadcast of the primary communication system. For example, the first and second communications may vary in volume – either absolute volume or relative volume. Other differentiators may be present to assist a user in detecting that a second communication is being broadcast. In some embodiments, the second communication is an alert regarding a device status. In some embodiments, the second communication includes a response to a user query. However, the second communication may be used for other content, source-specific communication, etc. In some embodiments, “actuating a secondary communication system” can involve powering on, enabling, or otherwise allowing a separate communication pathway configured to provide notifications, alerts, or other audible outputs distinct from the primary communication system. For example, this may comprise energizing a dedicated power source or circuit for a bone conduction transducer, establishing or initializing a unique communication link—whether wired or wireless—between a controller and the bone conduction transducer, and loading or starting any firmware or software routines that may process status signals and deliver corresponding alerts via bone conduction. “Actuating” may cover the actions that may render this secondary communication system functional and ready to broadcast content intended for the wearer’s attention. Detecting an operational status of the article of PPE using at least one sensor of the article of PPE can include monitoring one or more parameters associated with the device’s functionality or the wearer’s environment. For instance, the at least one sensor may measure battery level, filter loading, airflow, or face- seal integrity within a respirator. The sensor can provide signals—such as voltage, resistance, or digital data— that may be processed by a controller to identify when a given parameter rises above or falls below a predefined threshold. In some cases, this detected operational status may prompt further actions or notifications. For example, when a sensor indicates that a remaining battery level has declined past a certain point, the system can generate an alert instructing the user to recharge or replace the battery. Similarly, if the sensor detects a pressure drop suggesting that a respirator filter is clogged, the system may notify the wearer to replace the filter. This flexible approach to detecting operational status can help ensure that the PPE article is used effectively and maintains its protective capabilities. Receiving the second transmission over a wired or wireless communication protocol may involve any suitable data transfer method that conveys the operational status or alert message from a controller or sensor interface to the secondary communication system. For instance, the second transmission can be routed via a short-range wireless standard (such as Bluetooth® Low Energy) or a proprietary radio-frequency link dedicated to PPE communications. Likewise, a wired connection could employ simple analog signals or a standardized digital bus (for example, UART, I²C, or SPI) to carry the transmission. In certain implementations, this receiving stage can include authentication or handshake procedures that confirm the integrity and source of the second transmission before it is acted upon by the bone conduction transducer. As a result, the method can ensure reliable delivery of the operational status data, reducing risks associated with dropped signals or interference. Routing the second transmission to the bone conduction transducer can involve transferring the operational status data from a controlling component or interface into a dedicated signal path optimized for driving the transducer. This process may include converting the status data into audio-frequency signals or vibration-control commands, depending on whether the system uses analog or digital signaling. In some implementations, the controller may apply a specific amplitude, modulation, or frequency to ensure that alerts delivered via bone conduction are clear and distinct when perceived by the wearer. In addition, routing may encompass any prioritization logic or signal management steps that help avoid interfering with other audio outputs. For instance, if the primary communication system is actively broadcasting a separate voice channel, the controller may temporarily adjust volumes, pause non-urgent outputs, or overlay the alert in a manner that is still noticeable through bone conduction. Providing the second transmission to a wearer via bone conduction without interrupting the broadcast of the first transmissions over the primary speaker can involve situating a bone conduction transducer against the wearer’s skull—often near the temporal bone—so that vibrations travel directly to the wearer’s inner ear. By bypassing the conventional air-conduction pathway, this approach allows the wearer to perceive distinct notifications or alerts that do not interfere with any voice or other audio content being played over the primary speaker. As a result, the user can continue participating in or monitoring primary communications—such as conversations or team instructions—while still receiving alerts or status updates. In some implementations, the system may manage the amplitude, frequency, or temporal characteristics of the vibration in a way that ensures the second transmission is intelligible and easily distinguished from ambient noise or any concurrent audio coming from the primary system. This can include boosting the alert volume or employing a particular vibration pattern so that the notification stands out effectively, even in high-noise environments. By adopting these strategies, the PPE system enables uninterrupted primary communications while concurrently delivering essential operational status information through bone conduction. FIGS. 6A-6G illustrate bone conduction transducer placement options in accordance with embodiments herein. FIG. 6A illustrates one example of a head-mounted PAPR unit 600. However, it is expressly contemplated that the example mounting options described herein may be suitable for any PAPR or head-mounted PPE that has a headband or other feature that can urge a transducer into place on a user’s temporal bone. Bone conduction transducers with a small footprint may be beneficial for embodiments herein as it is often the case that a user wearing PPE is wearing an article of over-ear or head protection. It is desired that a bone conduction transducer have a footprint that is compatible with a wide range of head-mounted PPE. Detecting an operational status of the article of PPE using at least one sensor of the article of PPE can include monitoring one or more parameters associated with the device’s functionality or the wearer’s environment. For instance, the at least one sensor may measure battery level, filter loading, airflow, or face- seal integrity within a respirator. The sensor can provide signals—such as voltage, resistance, or digital data— that may be processed by a controller to identify when a given parameter rises above or falls below a predefined threshold. In some cases, this detected operational status may prompt further actions or notifications. For example, when a sensor indicates that a remaining battery level has declined past a certain point, the system can generate an alert instructing the user to recharge or replace the battery. Similarly, if the sensor detects a pressure drop suggesting that a respirator filter is clogged, the system may notify the wearer to replace the filter. This flexible approach to detecting operational status can help ensure that the PPE article is used effectively and maintains its protective capabilities. FIGS. 6A-6B illustrates one potential bone conduction placement option 602. FIG. 6B illustrates a view 610 of just a headband portion of the PAPR 600. Placement of the transducer with respect to a user’s skull is important. Bone conduction, in theory, works as long as the transducer is in contact with any portion of a user’s skull. However, in some embodiments herein the transducer is placed such that it is likely that it will contact the temporal skull plate, which surrounds the ear canal, as such placement shows improvement in sound quality over other potential skull plate placements. However, it is expressly contemplated that other positions may be suitable, depending on PPE worn. Another location consideration is the need to apply sufficient pressure so that the transducer has good contact with the skull such that produced vibrations are strong enough. However, there is a point at which too much pressure causes discomfort. It is desired that the transducer be placed such that pressure is sufficient, but not uncomfortable. In the illustrated embodiment of FIGS. 6A-6G, the helmet headband provides a good mechanism for providing the needed pressure as the headband already should be tight enough to hold the helmet on the user’s head. Additionally, the right and left sides of the headband provide fairly long, fairly straight lines of tension between the forehead and rachet. This allows for placement of a bone conduction transducer such that it presses gently but sufficiently against the temporal bone. The skull is also fairly flat in this area so there is lower chance of a uncomfortable pressure point forming. FIG. 6C illustrates one example of a housing 606 for a bone conduction transducer. Slots 608 align with a chin seal, so a housing with a depression between slots 608 may be able to receive a bone conduction transceiver without causing significant discomfort. FIG. 6D illustrates the bone conduction transducer held in place by glass tape, selected for this example because it does not stretch. However, it is expressly contemplated that transducer 620 may be held in position in a number of other suitable ways including mechanical (e.g. a lock-and-key configuration, snaps, etc.), adhesive, welding or other bonding, or another suitable technique. FIG. 6E illustrates a view 640 illustrating the total thickness of the headband with the transducer attached. It is desired that a transducer be held against a user’s head without causing discomfort due to pressure points. In some embodiments, the transducer 620 has a thickness that is smaller than a length or width, such that the smallest dimension is placed between the headband and the head of a user. In some embodiments, as illustrated in FIG. 6F, the transducer 620 has a small enough footprint that a sweatband can be wrapped around the headband, at least partially obscuring the bone conduction transducer. The example illustrated in FIGS.6A-6F was constructed by cutting a hole in the headband. However, it is expressly contemplated that the bone conduction transducer 620 may be coupled to the headband in another manner – e.g. adhered, bonded or mechanically coupled to an inner surface of the headband. However, it may be preferred to have at least some of transducer 620 extend into the headband to reduce a thickness extending from an interior surface of the headband toward the head. The greater the thickness extending inward from the headband, the more likely that the protruding bone conduction transducer will be felt by a user. It may also increase difficulty in donning / doffing the headband without disrupting the transducer placement. FIG.6G illustrates a mount 650 that angles transducer 620 at an angle 652. The angle 652 may help to urge transducer 620 against the user’s head, improving contact with the user’s skull. In some embodiments, a foam 654 backing may provide some compliance to improve contact without causing discomfort. FIGS. 6A-6G illustrate placement options for a magnetic transducer within a headband of a head- mounted PPE. However, it is expressly contemplated that other types of transducers may be suitable, that other placements may be suitable, and that other configurations may be suitable. For example, a bone conduction transducer may not be coupled to an article of PPE in some embodiments, and may be a separate article worn by a user. FIGS.6A-6G illustrate a bone conduction transducer speaker. However, it is expressly contemplated that, in some embodiments, a microphone is also present, such that a secondary communication system includes a separate microphone than a primary communication system. The microphone of a bone conduction- based communication system may be a shorter microphone, in some embodiments, instead of a full boom microphone, which may be more suitable for a primary communication system in accordance with some embodiments herein. FIG. 7 illustrates a method of operating multiple communication systems within a personal area network in accordance with embodiments herein. A personal area network is a network that connects electronic devices within a short range – e.g. an individual’s personal workspace. A personal area network, in accordance with embodiments herein, may reach far enough to join articles of PPE worn by a user to the network, but not far enough to interfere with the articles of PPE of another user. A personal network may be at least partially wired, for example using USB, IEEE 1394, Thunderbolt networks or other suitable wired technology. In some embodiments, the personal network is at least partially wireless – for example operating over a short-distance wireless network such as IrDA, wireless USB, Bluetooth®, Bluetooth® LTE, Bluetooth® Low Energy, NearLink, Zigbee, IE 802.15, NFC or another suitable wireless protocol. In some embodiments, the wireless personal area network utilized a low power wireless technology. In some embodiments, the personal area network is a low-power personal area network (LPPAN). At block 710 a personal area network (PAN) is actuated. The personal area network may be managed by an article of PPE worn by a user, or by another device – a system control unit, a push-to-talk unit, or another suitable network generating and managing device. The PAN may be actuated when a PAN-managing device is first turned on or fully powered (e.g. brought out of sleep or charging mode, etc.). At block 720, PPE devices associated with a user are joined to the PAN. In some embodiments, PPE devices are joined automatically when detected and in range. In some embodiments, PPE devices are joined when approved by a user. Some devices may automatically join, while others require user approval in some embodiments. Other configurations are possible. When a new device is joined, in some embodiments, network management may change to the new device. At block 730, the primary communication system is actuated. In some embodiments, the primary communication system is actuated or adjusted as each PPE device joins the network. For example, as discussed above, a microphone may be selected based on a best quality microphone available. A pair of in- ear hearing protection devices may first join the PAN, and the microphone and speaker of the in-ear hearing protection devices may automatically be selected for the primary communication system, as no other options are available. When a pair of over-earmuffs are added, and a microphone thereof detected, a communication manager may change the microphone of the primary communication system to the over-earmuff microphone. Such an evaluation may take place as each PPE device is added, in some embodiments. Once actuated, primary communication system is used for the majority of communication to and from the user associated with the PPE. For example, communication coming in over radio frequencies from other users, over walkie-talkies, over cellular communication, etc. may all be automatically routed through the primary communication system. At block 740, a second type of communication is received that is detected by a communication manager as not for routing through the primary communication system. For example, the second type of communication may originate from one of the PPE devices in the PAN. For example, a signal may be received from a PAPR in the PAN indicating a low power level remaining. A wake word, or other indication, may be detected either in the speech of or by another indication from a user, in another example, indicating that the following speech is directed to a processing system within one or more devices within the PAN, and not to be transmitted outside the PAN. At block 750, the second type of communication is routed through a secondary communication system. Alerts received from PPE devices, or received from outside the PAN, may be delivered through the secondary communication system. Responses to user-initiated queries may be routed through the secondary communication system. By reserving the secondary communication system for certain types of communications, it may be easier for a user to detect and focus on those communications as they come in. In some embodiments, the secondary communication system delivers communication in a fundamentally different way. For example, some embodiments herein utilize a bone conduction transducer to transmit sound through vibrations as opposed to sound waves delivered through the ear canal. FIG. 8 is a schematic illustration of a communication environment in accordance with embodiments herein. In some embodiments herein, a communication management system is at least partially responsible for determining what communication is routed through which communication systems. Systems herein include a bone conduction communication system having a bone conduction transducer in addition to a full duplex primary communication system that allows for communication between different individuals. In some embodiments herein, the primary communication system is configured to be used in a mesh network such that a user, in addition to receiving alerts or information over the secondary communication system, can communicate with different individuals throughout a work environment. Systems and methods herein allow for a user to have greater control over what other individuals they are in communication with at a given time. Some communication systems currently available allow for the automatic formation of groups based on geographic proximity. However, this may be limiting in some real- world applications. For example, users may be close to each other on a map, but one individual may be working at a higher altitude, which may place them outside of the automatic group formation range. Additionally, some individuals may be part of a single working group, but may need to move physically apart from each other – for example to go and get a needed tool or to check on equipment away from the rest of the group. It may be desired to maintain conversation with the working group over a broader physical range, without also including anyone else in proximity. Communication environment 800 illustrates a number of workers 810A-E. Each worker is wearing a first article of PPE 812A-E and a second article of PPE 814A-E. Each worker also has a primary communication system 816A-E. Primary communication systems 816 each include a microphone and a speaker, selected from either of PPE 1812 and / or PPE 2814. In embodiments herein, each worker has at least one device capable of generating and maintaining a communication network between individuals. This may be particularly useful, for example, if worker 810D wants to leave Group 1820A. If worker 810D had the device that had previously been controlling membership and communication within Group 1, another group member should have a device that can take over network control so that the communication between workers 810A and 810B. Illustrated in FIG.8, the first article of PPE associated with worker 810, PPE 1812A, includes a communication management system 830. However, while a single communication management system 830 is illustrated in FIG. 8, it is expressly contemplated that each worker 810 may have one or more devices that include a communication management system. Additionally, while communication management system 830 is illustrated in FIG.8 as being incorporated into a PPE device, it is expressly contemplated that communication management system 830 may be incorporated into another device worn by a user, e.g. managed through a computer application on a mobile computing device, incorporated into another wearable device such as a smartphone, a PTT, an SCU or another device, or may be incorporated into a separate device within environment 800 or elsewhere. Communication management system 830 includes a group generator 832 capable of generating a group within a mesh network. A group membership manager 834 may be responsible for managing how many, and which, workers 810 are included in a given group. For example, a group may have a maximum possible number of members at a time. When a new member attempts to join a full group, membership manager 834 may either reject the new member or may remove an existing member to make space for the new member. Communication management system 830 may have access to a datastore 850 with information about group history 852 for a given user, a location 854 for a given user, a work profile 856 for a given user, as well as other information. Group membership manager 834 may, for example, prioritize adding a new member that is assigned to the same work task. Group membership manager 834 may remove a user that has been in the group longer without speaking in order to make way for a new member. Location of users may be considered. Additionally, it is also expressly contemplated that group manager may operate at least partially in response to user input from the user associated with the network managing device, e.g. worker 810A wearing PPE 1812A in the illustrated example of FIG.8. Within each worker’s PAN, a communication router 836 may determine whether a communication is intended for broadcast, using a primary communication system, to a group that worker 810A is associated with, or whether a secondary communication system should be used. For example, each of workers 810A- 810E may be wearing a device specific to a secondary communication system, such as a bone conduction transducer for a bone conduction system dedicated to providing communication within the PAN. As illustrated in FIG.8, it is expressly contemplated that membership in either Group 1 or Group 2 is not solely based on location, as worker 810C is associated with group 2820B, but is closer in proximity to worker 810A, which is managing group 1820A. A network through which workers 810A-810E communicate is, in some embodiments herein, a mesh network that allows for rebroadcasting of communication across a mesh, allowing for transmission of communication across a larger distance to designated members of a given group. Both of groups 820 may have dynamic membership in embodiments herein, such that a conversation can continue as members join or leave each group. In some embodiments, the network uses a time-division multiple access method, or another time-division multiplexing (TDM) method for allowing multiple users to join and leave the network. TDM networks may allow for easier handing off of the network control as devices join or leave the network. Datastore 850 is illustrated as a single memory component communicably coupled to communication management system 830. However, it is expressly contemplated that data retrieved by communication management system 830 may come from a variety of sources. For example, datastore 850 may be stored in a memory associated with PPE 1812A, such that communication management system 830 retrieves relevant information for group management system 834 from a local source. However, it is expressly contemplated that datastore 850 may be distributed. For example, each PPE 812A-E may store relevant user information about each of workers 810A-E, for example, which may be evaluated to determine group membership. However, it is expressly contemplated that the information listed in datastore 850 is retrieved from a remote source or distributed in another configuration. In some embodiments herein, communication management system 830 determines which users to combine into different groups. However, it is expressly contemplated that, in some embodiments, a user is responsible for manually selecting a group to join and / or manually selecting which other individuals to invite to a group. In some embodiments herein, at least some data managed by the communication system is encrypted, and / or how voice information is encoded for transmission and decoded for reception, e.g. which codecs should be used. In some embodiments herein the network utilizes a Bluetooth® low energy mesh radio network which facilitates full duplex communication between multiple users. However, it is expressly contemplated that other network protocols may also be suitable. FIG.9 illustrates a schematic of an example Communication Management System in accordance with embodiments herein. Communication management system 900 may be built into a wearable device such as an article of PPE, a mobile computing device such as a smartphone or a smartwatch, a PTT device, a control unit or any other suitable device, in some embodiments herein. However, it is expressly contemplated that, in some embodiments the communication management system 900 is built into a device remote from a user, or may even be accessed using a wireless or cloud protocol. A communication selector 910 may select whether a communication should be routed through a primary communication system 920 or a secondary communication system 930. In some embodiments, no communication is broadcast through both the primary and secondary communication systems, instead all communication is routed through either one or the other. The primary communication system 920 includes a microphone 922 and a speaker 924. Primary communication system 920 may also have other functionality – for example, microphone 922 and / or speaker 924 may be associated with an article of personal protective equipment. Similarly, secondary communication system 930 includes a microphone 930 and a speaker 936. In some embodiments, microphone 922 and microphone 934 are the same microphone. Secondary communication system 930 may include other functionality 936. Either or both of communication systems 920, 930 may have some sound processing functionality in some embodiments herein. Either or both of communication systems 920, 930 may have some encryption or encoding / decoding functionality. Alternatively, as illustrated in FIG. 9, data encryption / decryption or codec management may be managed by data manager 944. In some embodiments, data manager 944 is responsible for making communication in a group private and less accessible from other groups. Data manager 944 may also be responsible for ensuring that conversations do not leak between groups, such that conversation between members of Group 1 is not audible and does not ‘leak’ into Group 2. In some embodiments, a communication group may be designated as private by activating a ‘privacy mode’ between users. The privacy mode may be based on RSSI, for example, or another mechanism, for example a activating a privacy mode using a physical switch, button, toggle, etc. In some embodiments, an audible and / or visual annunciator may be presented to indicate that a conversation is private. In some embodiments, a user may also adjust how, or whether, their speech is transmitted to a Group over a communication protocol. For example, a user may prefer to hum or sing to themselves and, therefore, may want to be present in their Group in a listen-only mode. This would allow the user to maintain awareness of the communication within their Group while maintaining comfort. A communication component 940 may be responsible for sending communications over different protocols. For example, a detected user query may be communicated to an appropriate device for a response. E.g. a user may query “how much PAPR battery life remains?” and communication component 940 may communicate the query to a processing unit of the PAPR to determine an answer, which may then transmit an answer. Communication component 940 may operate using a number of different communication protocols, depending on a receiving or transmitting device. In some embodiments, communication component 940 is also responsible for transmitting communications to other individuals. For example, communication component 940 may communicate speech received through a microphone 922 to individuals within a group, based on an indication from recipient manger 962, for example. Communication component 940 may operate using any number of suitable wired or wireless protocols as described herein. A communication management system 900 may also include a network manager 950. As described above with respect to FIG. 8, in some embodiments each worker wears at least one device that includes a network manager 950. While network manager 950 is illustrated as a separate component from primary and secondary communication systems 920, 930, it is expressly contemplated that a device that includes, for example, any of microphones 922, 932 or speakers 924, 934 may also include network manager. For example, a PAPR may include a processing component that completes the functions of network manager 950. However, it is expressly contemplated that, in some embodiments, network manager 950 is separate from a PPE device, or even located remote from a worker. Network manager 950 includes a network generator 952 which may generate a wireless network to which a number of communication systems can be joined such that a number of users can converse. Network generator 952 may operate using any of a number of suitable wireless protocols. In some embodiments, network generator 952 generates a mesh network. In some embodiments, a network is already present, for example generated by a different user. The user associated with communication management system 900 includes a network selector 956 which may allow a user to see, and select from, a number of available communication groups 958. When a user wants to join a network, a recipient manager 962 may determine whether or not a slot is available on a given communication channel. For example, a given network protocol may allow up to 6 individuals at a time. If a 7^th individual attempts to join, recipient manager 962 may determine whether to reject the 7^th individual, or whether to allow the 7^th individual to take the place of one of the current 6 group members. For example, a recipient manager 962 may prioritize keeping group members that have been more active in a conversation in some embodiments. In some embodiments, a distance between users may be prioritized, calculably by an RSSI (Received Signal Strength Indicator) signal or another distance indicator. Other sensor indicators may be used – such as a direction a user is facing (e.g. using an accelerometer and / or a compass or another suitable sensor). In some embodiments, a number of considerations may be used in an evaluation of which individuals should be retained in a group. A user may want to transfer groups, for example as they change a work assignment or if there is a need to converse with different individuals. A network transferer 954 may be responsible for receiving an indication, for example from group selector 958, that the user wishes to switch from a first group to a second group. Network transferer 954 may remove the user from the first group and join the user to a network associated with the second group. In some embodiments, a codec selection may be needed, for example to encode, decode, compress or decompress a data stream. A user may provide an indication that they wish to join or leave a group using a number of user input mechanisms 970. In some embodiments, a user may provide a spoken indication that is detected and processed using the secondary communication system. For example, a user may speak, after a detected wake word, “I wish to join John’s group.” Secondary communication system 930 may include parsing functionality that determines that the user (1) wishes to leave a current group, (2) wishes to join a second group, and (3) that the second group is a group that includes John. In some embodiments, a user instead selects a group using a user interface of a mobile computing device, or using a toggle, dial or other mechanical mechanism associated with a wearable device, such as a PTT or SCU. Other suitable user input mechanisms 970 are expressly contemplated. In some embodiments, communication management system 900 may include the ability to capture voice information for encoding, for example using microphone 922, 932 or another suitable mechanism. In some embodiments, communication management system 900 also includes techniques to isolate speech from environmental noise and, in the event one of the articles of PPE includes a PAPR, respiratory related baffling effects. FIG. 10 illustrates a method of transferring communication groups in accordance with embodiments herein. Workers in an environment want to be able to communicate with each other. PPE can interfere with the ability to communicate naturally with coworkers – hearing protection devices are designed to muffle ambient sound; respiratory protection devices, such as PAPRs, cover parts of a user’s face, making it difficult to understand speech; etc. One problem facing PPE compliance and worker safety is the risk that workers may remove or adjust PPE in order to be able to more easily converse with each other. Systems herein may make it easier for workers to start, stop, enter and leave conversations with other coworkers while using the communication systems of their PPE. Having a simple process for managing communication may improve PPE compliance. Method 1000 illustrates an example process for a user to switch from a first communication group to a second communication group. Having a simple process for switching between conversations may increase adoption of systems described herein and increase compliance with PPE requirements. At block 1010, an indication is received that a user wants to change conversations. The indication may be a verbal indication, for example a user speaking “talk to Fred” after a detected wake word. The indication may be based on sensed user behavior. For example, a user may turn to face a worker that is not in their current conversation group. E.g. a user may look up and face a direction that includes Fred on a ladder. This may trigger a communication manager associated with the user to either automatically switch the user to a conversation with Fred and / or provide a suggestion to the user to switch to a group that includes Fred (or invite Fred to the user’s current group). E.g. a visual indication may appear on a heads-up display or an audible suggestion may be provided using a secondary communication system separate from the communication system used for conversation within the group. It is expressly contemplated that, in some embodiments, group membership for a user is not changed without user acknowledgement / approval. In some embodiments, the indication received is a confirmation from a user to accept an invitation from a group for the user to join. At block 1020, the user leaves the first group. At block 1030, the user joins the second group. While blocks 1020 and 1030 are illustrated as separate steps in FIG. 10, it is expressly contemplated that they may occur simultaneously or at least partially overlap. For example, a communication manager for the user may first query to determine whether the second group has an open communication slot for the user to join. If there is no open communication slot, the communication manager may not automatically remove the user from the first group. In some embodiments, if the user’s desired group is full, the user may, using a network manager, start a new group, such that the ‘second group’ of block 1030 is a new group, and joining the second group includes inviting other individuals to join the new group. FIG.11 illustrates a method of managing networked communication in accordance with embodiments herein. As described herein, in some embodiments each worker in an environment has at least one device that includes a communication manager. The communication manager may access a memory unit which stores information about a current conversation group the user belongs to. The memory unit may be local to the device, associated with a different wearable device associated with the user, accessed wirelessly from a remote source, etc. Group networks in embodiments herein may be time division multiplexing groups that enable users to join and leave without significant interruption to the conversation. However, it is expressly contemplated that other network configurations are also possible. At block 1110, it is detected that the device managing a network for a group conversation is leaving, or has left, the group. At block 1120, a communication management system associated with a different device retrieves network information. While it is illustrated in method 1100 that block 1120 may happen after block 1110, it is expressly contemplated that these actions may happen at least partially simultaneously. For example, in some embodiments a handshake occurs between the device leaving the network and a second device which will take over management of the group network. The device taking over the group network may retrieve network information for the group – e.g. current group membership, group membership history, location of group members, group member work assignments or any other suitable parameters that may be helpful for evaluating group participation. At block 1130, the new device takes over management of the group network. In some embodiments, it is expressly contemplated that the original group may split into two or more subgroups. The new group network managing device may be selected automatically, in some embodiments. For example, the departing device may select the new device based on any suitable parameter – for example the device with the longest communication history may be selected, or the device in closest proximity to other devices in the group, or another suitable parameter. In some embodiments the device taking over the group network is selected automatically based on a timing slot position within the TDM network. FIG. 12 is a block diagram of a communication management system architecture. The remote server architecture 1200 illustrates one embodiment of an implementation of a communication management system 1210. As an example, remote server architecture 1200 can provide computation, software, data access, and storage services that do not require end-user knowledge of the physical location or configuration of the system that delivers the services. In various embodiments, remote servers can deliver the services over a wide area network, such as the internet, using appropriate protocols. For instance, remote servers can deliver applications over a wide area network and they can be accessed through a web browser or any other computing component. Software or components shown or described in FIGS. 1-11 as well as the corresponding data, can be stored on servers at a remote location. The computing resources in a remote server environment can be consolidated at a remote data center location or they can be dispersed. Remote server infrastructures can deliver services through shared data centers, even though they appear as a single point of access for the user. Thus, the components and functions described herein can be provided from a remote server at a remote location using a remote server architecture. Alternatively, they can be provided by a conventional server, installed on client devices directly, or in other ways. A user 1050 may interact with system 1210 using a PPE system 1222. In the example shown in FIG. 12, some items are similar to those shown in earlier figures. FIG. 12 specifically shows that a digital defect tracking system can be located at a remote server location 1202. Therefore, system 1210 accesses those systems through remote server location 1202. FIG. 12 shows that, in some embodiments, it is also contemplated that some elements of systems described herein are disposed at remote server location 1202 while others are not. By way of example, storage 1230, 1240 or 1260 can be disposed at a location separate from location 1202 and accessed through the remote server at location 1202. Regardless of where they are located, they can be accessed directly by computing device 1220, through a network (either a wide area network or a local area network), hosted at a remote site by a service, provided as a service, or accessed by a connection service that resides in a remote location. Also, the data can be stored in substantially any location and intermittently accessed by, or forwarded to, interested parties. For instance, physical carriers can be used instead of, or in addition to, electromagnetic wave carriers. It will also be noted that the elements of systems described herein, or portions of them, can be disposed on a wide variety of different devices. Some of those devices include servers, desktop computers, laptop computers, imbedded computer, industrial controllers, tablet computers, or other mobile devices, such as palm top computers, cell phones, smart phones, multimedia players, personal digital assistants, etc. FIGS.13-14 show examples of mobile devices that can be used in the embodiments shown in previous Figures. FIG.13 is a simplified block diagram of one illustrative example of a handheld or mobile computing device that can be used as a user's or client's handheld device 1321 (e.g., as computing device 1520 in FIG. 15), in which the present system (or parts of it) can be deployed. For instance, a mobile device can be deployed in the operator compartment of computing device 1320 for use in generating, processing, or displaying the data. FIG.12 is another example of a handheld or mobile device. FIG.13 provides a general block diagram of the components of a client device 1316 that can run some components shown and described herein. Client device 1316 interacts with them, or runs some and interacts with some. In the device 1316, a communications link 1313 is provided that allows the handheld device to communicate with other computing devices and under some embodiments provides a channel for receiving information automatically, such as by scanning. Examples of communications link 1313 include allowing communication though one or more communication protocols, such as wireless services used to provide cellular access to a network, as well as protocols that provide local wireless connections to networks. In other examples, applications can be received on a removable Secure Digital (SD) card that is connected to an interface 1315. Interface 1315 and communication links 1313 communicate with a processor 1317 (which can also embody a processor) along a bus 1319 that is also connected to memory 1321 and input/output (I/O) components 1323, as well as clock 1325 and location system 1327. I/O components 1323, in one embodiment, are provided to facilitate input and output operations and the device 1316 can include input components such as buttons, touch sensors, optical sensors, microphones, touch screens, proximity sensors, accelerometers, orientation sensors and output components such as a display device, a speaker, and or a printer port. Other I/O components 1323 can be used as well. Clock 1325 illustratively comprises a real time clock component that outputs a time and date. It can also provide timing functions for processor 1317. Illustratively, location system 1327 includes a component that outputs a current geographical location of device 1316. This can include, for instance, a global positioning system (GPS) receiver, a LORAN system, a dead reckoning system, a cellular triangulation system, or other positioning system. It can also include, for example, mapping software or navigation software that generates desired maps, navigation routes and other geographic functions. Memory 1321 stores operating system 1329, network settings 1331, applications 1333, application configuration settings 1335, data store 1337, communication drivers 1339, and communication configuration settings 1341. Memory 1321 can include all types of tangible volatile and non-volatile computer-readable memory devices. It can also include computer storage media (described below). Memory 1321 stores computer readable instructions that, when executed by processor 1317, cause the processor to perform computer- implemented steps or functions according to the instructions. Processor 1317 can be activated by other components to facilitate their functionality as well. FIG. 14 shows that the device can be a smart phone 1471. Smart phone 1471 has a touch sensitive display 1473 that displays icons or tiles or other user input mechanisms 1475. Mechanisms 1475 can be used by a user to run applications, make calls, perform data transfer operations, etc. In general, smart phone 1471 is built on a mobile operating system and offers more advanced computing capability and connectivity than a feature phone. Note that other forms of the devices 1416 are possible. FIG. 15 is a block diagram of a computing environment that can be used in embodiments shown in previous Figures. FIG. 15 is one example of a computing environment in which elements of systems and methods described herein, or parts of them (for example), can be deployed. With reference to FIG. 15, an example system for implementing some embodiments includes a general-purpose computing device in the form of a computer 1510. Components of computer 1510 may include, but are not limited to, a processing unit 1520 (which can comprise a processor), a system memory 1530, and a system bus 1521 that couples various system components including the system memory to the processing unit 1520. The system bus 1521 may be any of several types of bus structures including a memory bus or memory controller, a peripheral bus, and a local bus using any of a variety of bus architectures. Memory and programs described with respect to systems and methods described herein can be deployed in corresponding portions of FIG.15. Computer 1510 typically includes a variety of computer readable media. Computer readable media can be any available media that can be accessed by computer 1510 and includes both volatile/nonvolatile media and removable/non-removable media. By way of example, and not limitation, computer readable media may comprise computer storage media and communication media. Computer storage media is different from, and does not include, a modulated data signal or carrier wave. It includes hardware storage media including both volatile/nonvolatile and removable/non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by computer 1510. Communication media may embody computer readable instructions, data structures, program modules or other data in a transport mechanism and includes any information delivery media. The term “modulated data signal” means a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. The system memory 1530 includes computer storage media in the form of volatile and/or nonvolatile memory such as read only memory (ROM) 1531 and random access memory (RAM) 1532. A basic input/output system 1533 (BIOS) containing the basic routines that help to transfer information between elements within computer 1510, such as during start-up, is typically stored in ROM 1531. RAM 1532 typically contains data and/or program modules that are immediately accessible to and/or presently being operated on by processing unit 1520. By way of example, and not limitation, FIG. 15 illustrates operating system 1534, application programs 1535, other program modules 1536, and program data 1537. The computer 1510 may also include other removable/non-removable and volatile/nonvolatile computer storage media. By way of example only, FIG. 15 illustrates a hard disk drive 1541 that reads from or writes to non-removable, nonvolatile magnetic media, nonvolatile magnetic disk 1552, an optical disk drive 1555, and nonvolatile optical disk 1556. The hard disk drive 1541 is typically connected to the system bus 1521 through a non-removable memory interface such as interface 1540, and optical disk drive 1555 are typically connected to the system bus 1521 by a removable memory interface, such as interface 1550. Alternatively, or in addition, the functionality described herein can be performed, at least in part, by one or more hardware logic components. For example, and without limitation, illustrative types of hardware logic components that can be used include Field-programmable Gate Arrays (FPGAs), Application-specific Integrated Circuits (e.g., ASICs), Application-specific Standard Products (e.g., ASSPs), System-on-a-chip systems (SOCs), Complex Programmable Logic Devices (CPLDs), etc. The drives and their associated computer storage media discussed above and illustrated in FIG. 15, provide storage of computer readable instructions, data structures, program modules and other data for the computer 1510. In FIG.15, for example, hard disk drive 1541 is illustrated as storing operating system 1544, application programs 1545, other program modules 1546, and program data 1547. Note that these components can either be the same as or different from operating system 1534, application programs 1535, other program modules 1536, and program data 1537. A user may enter commands and information into the computer 1510 through input devices such as a keyboard 1562, a microphone 1563, and a pointing device 1561, such as a mouse, trackball or touch pad. Other input devices (not shown) may include a joystick, game pad, satellite receiver, scanner, or the like. These and other input devices are often connected to the processing unit 1520 through a user input interface 1560 that is coupled to the system bus, but may be connected by other interface and bus structures. A visual display 1591 or other type of display device is also connected to the system bus 1521 via an interface, such as a video interface 1590. In addition to the monitor, computers may also include other peripheral output devices such as speakers 1597 and printer 1596, which may be connected through an output peripheral interface 1595. The computer 1510 is operated in a networked environment using logical connections, such as a Local Area Network (LAN) or Wide Area Network (WAN) to one or more remote computers, such as a remote computer 1580. When used in a LAN networking environment, the computer 1510 is connected to the LAN 1571 through a network interface or adapter 1570. When used in a WAN networking environment, the computer 1510 typically includes a modem 1572 or other means for establishing communications over the WAN 1573, such as the Internet. In a networked environment, program modules may be stored in a remote memory storage device. FIG.15 illustrates, for example, that remote application programs 1585 can reside on remote computer 1580. A PPE system including an article of PPE including a sensor. The sensor is configured to sense a status of the article of PPE. The PPE system includes a primary communication system including a primary microphone and a primary speaker and a communication component configured to receive a communication and broadcast the received communication over the primary speaker. The system also includes a secondary communication system including a bone conduction transducer configured to provide the sensed status to a user. The system also includes a communication component configured to receive an indication of the sensed status and provide the sensed status to the secondary communication system. The system may be implemented such that the article of PPE includes the primary microphone or the primary speaker. The system may be implemented such that the article of PPE includes the secondary communication system. The system may be implemented such that the article of PPE includes a headband, and the headband includes the bone conduction transducer. The system may be implemented such that the bone conduction transducer is configured to be positioned next to the skull bone when the headband is worn by a wearer of the article of PPE. The system may be implemented such that the article of PPE includes a PAPR. The system may be implemented such that the PAPR includes a face shield. The face shield includes the headband. The system may be implemented such that the PAPR is a head-mounted PAPR. The system may be implemented such that the PAPR includes: a motor, a fan, and a power source configured to power the fan and the bone conduction transducer. The system may be implemented such that the article of PPE is a first article of PPE. The PPE system includes a second article of PPE. The system may be implemented such that the first article of PPE includes the primary microphone and the second article of PPE includes the primary microphone. The system may be implemented such that the first article of PPE includes a PAPR, a pair of in-ear hearing protection device, or an over-ear hearing protection device. The system may further include a communication routing selector that selects the primary microphone from a first microphone, of the first article of PPE, and a second microphone, of the second article of PPE. The system may be implemented such that the communication component uses a first communication protocol for the primary communication system and a second communication protocol for the secondary communication system. The system may be implemented such that the communication component is configured to detect a user device status query and, based on the device status query, retrieve the sensed status of the article of PPE. The system may be implemented such that sound provided by the bone conduction transducer is perceptively different from sound provided by the primary speaker. The system may be implemented such that the sound provided by the bone conduction transducer is louder than the sound provided by the primary speaker. The system may be implemented such that the bone conduction transducer is configured to broadcast the indication of the sensed status when received. The system may be implemented such that the indication of the sensed status is broadcast, using the bone conduction transducer, while a communication is broadcast through the primary speaker. The system may be implemented such that the article of PPE includes a facepiece strap, and the facepiece strap includes the bone conduction transducer. The system may be implemented such that the article of PPE includes a respirator. The system may be implemented such that the respirator is a reusable respirator. The system may be implemented such that the respirator is a supplied-air respirator. The system may be implemented such that the supplied-air respirator includes a compressor. A powered air purifying respirator (PAPR) system is presented that includes a PAPR. The PAPR includes a respirator mask, an air source, configured to supply air to the respirator mask, a motor configured to drive the fan, a power source configured to provide power the motor, and a PAPR status sensor. The system includes a primary communication system configured to receive an incoming transmission over a communication protocol and broadcast the received transmission over a speaker and a secondary communication system configured to provide an audible indication using a bone conduction transducer. The PAPR system may be implemented such that the PAPR includes the speaker. The PAPR system may be implemented such that the PAPR system includes a hearing protection device. The hearing protection device includes the speaker. The received transmission is received over a wireless communication protocol. The PAPR system may be implemented such that the audible indication includes a status of the PAPR. The PAPR system may be implemented such that the status includes an approximate run time remaining for the power source. The PAPR system may be implemented such that the power source powers the bone conduction transducer. The PAPR system may be implemented such that the PAPR further includes a headband, and the headband includes a housing configured to receive the bone conduction transducer. The PAPR system may include a second article of PPE and a communication manager. The communication manager is configured to select the speaker from a first speaker, associated with the PAPR, and a second speaker, associated with the second article of PPE. The PAPR system may be implemented such that the audible transmission is provided using the bone conduction transducer simultaneously while the incoming transmission is broadcast over the speaker. The PAPR system may include a communication manager configured to receive a user speech indication, from a microphone and determine, based on the user speech indication, that the user speech should be transmitted, by a communication component, over a wireless network using a wireless communication protocol. The PAPR system may include a communication manager configured to receive a user speech indication, from a microphone and determine, based on the user speech indication, that the user speech should be parsed by a speech parsing unit and a communication component, based on parsed user speech indication, generates a query for the PAPR status sensor. The audible indication includes an indication of a response to the query received from the PAPR status sensor. The PAPR system may be implemented such that the communication component transmits the user speech to a predetermined set of recipients. The PAPR system may be implemented such that the predetermined set of recipients is determined based on a communication group managed by the communication manager. The PAPR system may be implemented such that the bone conduction transducer provides the audible indication at a first volume, the received transmission is broadcast over the speaker at a second volume, and the first volume is greater than the second volume. The PAPR system may be implemented such that the audible indication is provided at a first time, and is repeated at a second time unless a user acknowledgement is received. The PAPR system may be implemented such that the audible indication includes a device status received from the PAPR status sensor. The PAPR system may be implemented such that the device status includes a remaining run-time or a remaining filter life for a PAPR filter. The PAPR system may be implemented such that the primary communication system includes an active hearing protection device configured to process the received transmission. The PAPR system may be implemented such that. The PAPR system may be implemented such that the PAPR is a head-mounted PAPR. The PAPR system may include a communication manager configured to receive a user speech indication, from a microphone and determine, based on the user speech indication, that the user speech should be parsed by a speech parsing unit. A communication component, based on parsed user speech indication, generates a parameter change for a component of the PAPR. A controller of the PAPR executes the parameter change. The PAPR system may be implemented such that the parameter change is a change in airflow and executing the parameter change includes the controller automatically adjusting a setting of the air source. The PAPR system may be implemented such that the air source includes a fan. The PAPR system may be implemented such that the air source includes a compressor. The PAPR system may be implemented such that the power source is a rechargeable power source. The PAPR system may be implemented such that the power source includes a solar power charging component. The PAPR system may be implemented such that the power source includes a triboelectric charging component. A communication system for an article of personal protective equipment (PPE) is presented that includes a primary communication system including a primary microphone and a primary speaker, a secondary communication system including a bone conduction transducer, a status sensor configured to sense an operational status of the article of personal protective equipment, and a communication component configured to broadcast an audio transmission, received over a wireless communication protocol over the primary speaker, and configured to provide the received operational status, using the bone conduction transducer. The audio transmission and the received operational status are provided substantially simultaneously. The system may be implemented such that the article of PPE includes the primary microphone or the primary speaker. The system may be implemented such that the article of PPE includes a PAPR. The system may be implemented such that the article of PPE includes an active hearing protection device. The system may be implemented such that the article of PPE is a first article of PPE. The system includes a second article of PPE. The first article of PPE includes the primary microphone. The second article of PPE includes the primary speaker. The system may include a signal router configured to select the primary microphone from a first microphone of the first article of the PPE and a second microphone of the second article of PPE. The system may be implemented such that the audio transmission is muted while the received operational status is provided. The system may be implemented such that the audio transmission is broadcast at a first volume, the operational status is provided at a second volume. The second volume is louder than the first volume. The system may be implemented such that the communication component is configured to transmit a speech indication, captured by the primary microphone, over the wireless communication protocol. The system may be implemented such that the communication component is configured to transmit the speech indication to a set of recipients on a network. The system may be implemented such that the set of recipients is retrieved based on a communication group associated with the communication component on the network. The system may be implemented such that the operational status includes an indication of a remaining runtime of a power source for the article of PPE. The system may be implemented such that the article of PPE includes the bone conduction transducer. The system may be implemented such that the article of PPE includes a headband. The headband includes the bone conduction transducer. The system may be implemented such that the article of PPE includes a head-mounted portion. The head-mounted portion includes the bone conduction transducer. The system may be implemented such that the headband includes a housing for the bone conduction transducer. The housing includes a compliant portion. The system may be implemented such that the compliant portion is configured to urge the bone conduction transducer toward a temporal bone of a user at an angle. The system may be implemented such that the bone conduction transducer is configured to contact a temporal bone of a user. The system may be implemented such that the bone conduction transducer includes a magnetic transducer. The system may be implemented such that the secondary communication system further includes a secondary microphone. The system may be implemented such that the secondary microphone includes a second bone conduction transducer. The system may be implemented such that the article of PPE includes a supplied air respirator. The system may be implemented such that the article of PPE includes a reusable respirator. The system may be implemented such that the received operational status is provided to the bone conduction transducer over a wired coupling using analog signals. The system may be implemented such that the received operational status is provided to the bone conduction transducer using a wired communication protocol. The system may be implemented such that the received operational status is provided to the bone conduction transducer using a wireless communication protocol. A method of routing communication within a PPE system is presented that includes actuating a primary communication system. The primary communication system includes: a primary microphone and a primary speaker. The PPE system includes an article of PPE. The article of PPE includes the primary microphone or the primary speaker. The primary communication system is configured to receive an audible transmission using a primary wireless protocol and broadcast the audible transmission over the primary speaker. The method also includes actuating a secondary communication system. The secondary communication system includes a bone conduction transducer. The method also includes receiving a second transmission over a wireless or wired communication protocol. The method also includes routing the second transmission to the secondary communication system. The method also includes providing the second transmission through the bone conduction transducer. The method may be implemented such that the PPE system includes a Personal Area Network. The method may be implemented such that the PPE system includes a first article of PPE coupled to the personal area network, the first article of PPE including the primary microphone. The method may be implemented such that the PPE system includes a second article of PPE coupled to the personal network, the second article of PPE including the primary speaker. The method may be implemented such that routing includes detecting that the second transmission includes an alert and routing the alert to the secondary communication system. The method may be implemented such that routing includes detecting that the second transmission originated from the article of PPE. The method may be implemented such that providing the second transmission includes providing the second transmission at a higher volume than the audible transmission. The method may be implemented such that broadcasting includes reducing a volume of the audible transmission while the second transmission is being provided. The method may be implemented such that broadcasting includes muting the volume of the audible transmission while the second transmission is being provided. The method may be implemented such that detecting includes identifying a source of the second transmission. The method may be implemented such that the second transmission includes a status of the article of PPE. The method may be implemented such that the status includes a low power remaining for the article of PPE. The method may be implemented such that detecting includes detecting an encoding indicating that the second transmission be routed to the secondary communication system. A head-mounted PPE system is presented that includes a powered air purifying respirator (PAPR). The PAPR includes a respirator mask configuring to cover the face of a user, a head-mounted air source configured provide air to the respirator mask, the air source including a motor-driven component, a power source configured to drive the motor, and a PAPR sensor configured to sense an operational status of the PAPR. The head-mounted PPE system also includes a headband configured to encircle a head of a wearer and a mount coupled to the headband. The mount is configured to receive a bone conduction transducer such that the bone conduction transducer is positioned against a temporal bone of the wearer. The head-mounted PPE system may include a hearing protection device including a microphone and a speaker. The hearing protection device is configured to receive an audio transmission, using a communication component, and broadcast the audio transmission over the speaker. The head-mounted PPE system may be implemented such that the bone conduction transducer is configured to provide the operational status received from the PAPR sensor. The head-mounted PPE system may include a sensor analyzer configured to receive the operational status, compare it to a threshold and the bone conduction transducer provides the operational status only if the operational status satisfies the threshold. The head-mounted PPE system may be implemented such that the bone conduction transducer is configured to provide the operational status simultaneously as the speaker broadcasts the audio transmission. The head-mounted PPE system may be implemented such that a first volume of the provided operational status is louder than a second volume of the audio transmission. The head-mounted PPE system may be implemented such that the second volume is muted while the operational status is provided. The head-mounted PPE system may be implemented such that the second volume is reduced. The head-mounted PPE system may be implemented such that the mount includes a compliant portion positioned such that the bone conduction transducer is angled with respect to the temporal bone. The head-mounted PPE system may be implemented such that the hearing protection device is an active hearing protection device. The head-mounted PPE system may be implemented such that the hearing protection device is a level- dependent hearing protection device. The head-mounted PPE system may be implemented such that the power source is remote from the air source. The head-mounted PPE system may be implemented such that the head-mounted air source includes a fan. The head-mounted PPE system may be implemented such that the head-mounted air source includes a pump. The head-mounted PPE system may be implemented such that the head-mounted air source includes a compressor. A communication management system is presented that includes a network manager for a wireless communication network. The network manager includes: a network generator configured to generate the wireless communication network and a recipient manager configured to manage a number of recipients on the wireless communication network. The system also includes an article of personal protective equipment (PPE), which includes a microphone configured to capture voice data, and a speaker. The system also includes a communication selector configured to transmit the captured voice data over the wireless communication network, to the number of recipients, and to broadcast an incoming audio transmission, from the wireless network, over the speaker. The system may be implemented such that the article of PPE includes the network manager. The system may include a bone conduction transducer. The communication selector is further configured to: receive an indication from the article of PPE, and provide the signal using the bone conduction transducer. The system may be implemented such that the indication includes a status of a component of the PPE. The communication management system may be implemented such that the network manager is further configured to: receive a request from a second communication component, of a second article of PPE, to join the wireless communication network, and join the second communication component to the network and add the second communication component to the number of recipients. The communication management system may be implemented such that the network manager is further configured to: detect that a maximum number of recipients is present on the wireless communication network, and remove an existing communication component from the network. The communication management system may be implemented such that the network manager is further configured to: evaluate the existing number of recipients, and select the existing communication component from the network based on a selection criteria. The communication management system may be implemented such that the wireless communication network is a time-division multiple access (TDMA) network. The communication management system may be implemented such that the recipient manager is configured to, based on a user input, classify the list of recipients as a private list of recipients. The communication management system may be implemented such that, in response to the classification, an indication of the classification is broadcast over the speaker. The communication management system may be implemented such that, in response to the classification, a visual indication of the classification is provided. The communication management system may be implemented such that the visual indication includes actuating an LED light or an icon on a display component. A personal protective equipment (PPE) system may be implemented such that it comprises an article of PPE including at least one sensor configured to detect a status of the article of PPE and to output a corresponding status signal; a communication system comprising a bone conduction transducer configured to provide an audible alert to a wearer, via bone conduction, when driven; and a controller operably coupled to the at least one sensor and the bone conduction transducer, the controller being configured to receive the status signal from the at least one sensor and drive the bone conduction transducer to provide an alert indicative of the operational status detected by the at least one sensor. In some implementations, the article of PPE is a powered air-purifying respirator (PAPR). In certain implementations, the at least one sensor is a battery-life sensor configured to generate the status signal when remaining power falls below a predetermined threshold. In additional implementations, the at least one sensor is a filter-loading sensor configured to detect whether a filter element of the article of PPE requires replacement. In some implementations, the controller is configured to repeat the alert via the bone conduction transducer at predetermined intervals until a user acknowledgment signal is received. In further implementations, the bone conduction transducer is integrated into or mounted on a headband portion of the article of PPE. In still other implementations, the system includes a primary communication system for wearer-to- wearer or wearer-to-remote communications, and the bone conduction transducer is dedicated to providing alerts indicative of the operational status detected by the at least one sensor. In some implementations, the controller is configured to drive the bone conduction transducer with a distinct volume or tonal pattern in order to differentiate the alert from other audible signals. In additional implementations, the system includes a user interface operably coupled to the controller, such that the user interface can receive a wearer-initiated query and prompt the controller to drive the bone conduction transducer with alert information in response. In certain implementations, the at least one sensor is a facial seal sensor configured to detect seal integrity between a facepiece of the article of PPE and the wearer’s face. A method of routing communications within a personal protective equipment (PPE) system may be implemented such that it includes actuating a primary communication system that has a primary microphone and a primary speaker associated with an article of PPE, with the primary communication system being configured to receive and broadcast first transmissions over a primary wireless protocol; actuating a secondary communication system that includes a bone conduction transducer; detecting an operational status of the article of PPE using at least one sensor of the article of PPE; generating a second transmission indicative of the detected operational status; receiving the second transmission over a wired or wireless communication protocol; routing the second transmission to the bone conduction transducer; and providing the second transmission to a wearer via bone conduction without interrupting broadcast of the first transmissions over the primary speaker. In some implementations, the method further includes repeating the second transmission via the bone conduction transducer at predetermined intervals until a user acknowledgment is received. In certain implementations, detecting the operational status includes monitoring a remaining battery power level of the article of PPE, and generating the second transmission occurs if the remaining battery power level is below a predefined threshold. In additional implementations, the operational status includes a filter-loading condition for a powered air-purifying respirator, and the second transmission comprises an indication that a filter element of the powered air-purifying respirator requires replacement. In some implementations, the bone conduction transducer is integrated into or mounted on a headband portion of the article of PPE. In further implementations, providing the second transmission via the bone conduction transducer involves using a distinct volume or pitch to differentiate the operational status alert from the first transmissions broadcast by the primary speaker. In still other implementations, the method further includes receiving an operator-initiated request for the operational status of the article of PPE and delivering the second transmission through the bone conduction transducer in response to that request. In some implementations, receiving the second transmission relies on a low-power wireless communication protocol. In additional implementations, the method includes adjusting an airflow setting of the article of PPE in response to the detected operational status, and generating the second transmission to indicate that the airflow setting has changed. In certain implementations, the method includes detecting a face-seal integrity between a respirator facepiece and a wearer’s face using the at least one sensor, and generating the second transmission upon determining that the face-seal integrity is compromised. The present invention has now been described with reference to several embodiments thereof. The foregoing detailed description and examples have been given for clarity of understanding only. No unnecessary limitations are to be understood therefrom. It will be apparent to those skilled in the art that many changes can be made in the embodiments described without departing from the scope of the invention. Thus, the scope of the present invention should not be limited to the exact details and structures described herein, but rather by the structures described by the language of the claims, and the equivalents of those structures.

Claims

What is claimed is: 1. A PPE system comprising: an article of PPE comprising at least one sensor, the at least one sensor configured to sense a status of the article of PPE and to output a corresponding status signal; a communication system comprising a bone conduction transducer configured to provide an audible alert to a wearer, when driven, via bone conduction; and a controller operably coupled to the at least one sensor and the bone conduction transducer, the controller being configured to: receive the status signal from the at least one sensor; and drive the bone conduction transducer to provide a corresponding alert indicative of the operational status detected by the at least one sensor.

2. The PPE system of claim 1, wherein the article of PPE includes a powered air-purifying respirator (PAPR).

3. The PPE system of any of the preceding claims, wherein the at least one sensor comprises a battery-life sensor configured to generate the status signal when remaining power falls below a predetermined threshold.

4. The PPE system of any of the preceding claims, wherein the at least one sensor comprises a filter- loading sensor configured to detect whether a filter element of the article of PPE requires replacement.

5. The PPE system of any of the preceding claims, wherein the controller is configured to repeat the corresponding alert via the bone conduction transducer at predetermined intervals until a user acknowledgement is received.

6. The PPE system of any of the preceding claims, wherein the bone conduction transducer is integrated into or mounted on a headband portion of the article of PPE.

7. The PPE system of any of the preceding claims, further comprising a primary communication system for wearer-to-wearer or wearer-to-remote communications, wherein the bone conduction transducer is reserved for providing alerts indicative of the operational status detected by the at least one sensor.

8. The PPE system of any of the preceding claims, wherein the controller is configured to drive the bone conduction transducer with a distinct volume or tonal pattern so as to differentiate the alert from other audible signals.

9. The PPE system of any of the preceding claims, further comprising a user interface operably coupled to the controller, the user interface being configured to receive a wearer-initiated query and to prompt the controller to drive the bone conduction transducer with alert information in response to said query.

10. The PPE system of any of the preceding claims, wherein the at least one sensor comprises a sensor configured to measure a pressure drop inside a facepiece of the article of PPE, the measured pressure drop being indicative of whether the facepiece is adequately sealed against the wearer’s face.

11. A method of routing communications within a personal protective equipment (PPE) system, the method comprising: actuating a primary communication system that includes a primary microphone and a primary speaker associated with an article of PPE, the primary communication system being configured to receive and broadcast first transmissions over a primary wireless protocol; actuating a secondary communication system that includes a bone conduction transducer; detecting an operational status of the article of PPE using at least one sensor of the article of PPE; generating a second transmission indicative of the detected operational status; receiving the second transmission over a wired or wireless communication protocol; routing the second transmission to the bone conduction transducer; and providing the second transmission to a wearer via bone conduction without interrupting the broadcast of the first transmissions over the primary speaker.

12. The method of claim 11, further comprising repeating the second transmission using the bone conduction transducer at predetermined intervals until a user acknowledgment is received.

13. The method of any of the preceding claims wherein detecting the operational status includes monitoring a remaining battery power level of the article of PPE, and generating the second transmission occurs if the remaining battery power level is below a predefined threshold.

14. The method of any of the preceding claims, wherein the operational status includes a filter-loading condition of a powered air-purifying respirator, and the second transmission indicates a filter element of the powered air-purifying respirator requires replacement.

15. The method of any of the preceding claims, wherein the bone conduction transducer is integrated into or mounted on a headband portion of the article of PPE.

16. The method of any of the preceding claims, wherein providing the second transmission via the bone conduction transducer involves using a distinct volume or pitch to differentiate the operational status alert from the first transmissions broadcast by the primary speaker.

17. The method of any of the preceding claims, further comprising receiving an operator-initiated request for the operational status of the article of PPE, and delivering the second transmission through the bone conduction transducer in response to that request.

18. The method of any of the preceding claims, wherein receiving the second transmission relies on a low- power wireless communication protocol.

19. The method of any of the preceding claims, further comprising adjusting an airflow setting of the article of PPE in response to the detected operational status, and generating the second transmission to indicate that the airflow setting has changed.

20. The method of any of the preceding claims, further comprising detecting a face-seal integrity between a respirator facepiece and a wearer’s face using the at least one sensor, and generating the second transmission upon determining that the face-seal integrity is compromised.