EP3522564A1 - Microphone assembly for the interior of a motor vehicle - Google Patents
Microphone assembly for the interior of a motor vehicle Download PDFInfo
- Publication number
- EP3522564A1 EP3522564A1 EP19000022.4A EP19000022A EP3522564A1 EP 3522564 A1 EP3522564 A1 EP 3522564A1 EP 19000022 A EP19000022 A EP 19000022A EP 3522564 A1 EP3522564 A1 EP 3522564A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microphone
- guide channel
- sound guide
- arrangement according
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002775 capsule Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000013016 damping Methods 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 4
- 229920005832 Basotect® Polymers 0.000 claims description 3
- 239000011491 glass wool Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
- H04R1/086—Protective screens, e.g. all weather or wind screens
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Definitions
- the invention relates to a microphone assembly for the interior of a motor vehicle, comprising a microphone having a microphone capsule, which is arranged on a printed circuit board, which in the interior of an assembly arranged in the interior of the motor vehicle, e.g. inside a roof control unit, is housed.
- Microphones which are housed in the interior of a motor vehicle, should be optically unobtrusive integrated into interior parts, which are used as interior parts often for economic reasons already existing in the vehicle interior modules, eg roof control units.
- the microphone capsule is therefore usually positioned on the circuit board located within the module or the roof control unit. Due to this positioning of the microphone capsule and due to the usual positioning of the printed circuit board within the module or the roof control unit, there is a spatial distance between the microphone capsule on the one hand and the outer surface of the module or the roof control unit on the other. This spatial spacing can lead to significant quality losses in the operation of the microphone assembly.
- the invention has the object, the above-described generic microphone assembly for the interior of a motor vehicle such that on the one hand with a small technical and design effort accompanying integration of the microphone assembly in existing anyway in the vehicle interior modules, e.g. in an overhead control unit, is possible, on the other hand, to ensure that a highest acoustic quality requirements sufficient operation of the microphone assembly to be secured.
- the microphone assembly comprises a sound guide channel, by means of which the microphone capsule of the microphone is acoustically connected to an outer surface of the assembly, and that the sound guide channel has at one or more positions damping material elements by means of which resonances of the sound guide channel can be suppressed , Accordingly, in the case of the above-described embodiment of the microphone arrangement according to the invention, damping is realized in the region of local sound velocity maxima.
- the damping material elements can be designed advantageously as a damping discs and can then be arranged with a comparatively little effort in the sound guide channel at its corresponding Schallschnellemaxima positions.
- damping material of the damping material elements or discs particularly suitable materials have open-cell foams, such as Basotect, glass wool, sintered metal, like Felt-Metal, proven; These materials have in common that by means of them sound-fast kinetic energy is convertible into thermal energy by the kinetic energy is converted by the above-mentioned materials through flowing air molecules into heat energy.
- the thickness of the damping discs is just chosen so that by means of the damping discs sufficient damping of the resonance by a standing wave and a sufficiently low attenuation of a once passing through the damper sound wave can be effected.
- the material of the damping material is sufficiently rigid in order to provide these effects on the outer surface of the module associated end portion of the sound guide channel.
- the cross section of the sound guide channel can be constant over its length.
- the cross section of the sound guide channel increases with increasing distance to the microphone capsule.
- the sound guide channel is funnel-shaped and the funnel circumference at the outer end of the sound guide channel facing away from the microphone capsule is greater than the wavelength to be used.
- the length of the funnel-shaped sound guide channel can be greater than half the wavelength to be used.
- the cross-section of the funnel-shaped sound guide channel can expand linearly, conically, stepwise, exponentially, bilinearly or hyperbolic with increasing distance to the microphone capsule.
- a damper disk may be located at the position of the transition from constant to flared cross-section.
- FIG. 1 shows a sectional view of an installable in the interior of a motor vehicle roof control unit 1.
- this roof control unit 1 includes a housing body 2 and a housing cover 3.
- the housing body 2 By means of the housing body 2, the roof control unit is mounted on a wall of the motor vehicle interior, the housing cover 3 closes the roof control unit 1 to the vehicle interior from.
- a circuit board 4 is arranged to sit on the various electronic components 5 of the roof control unit 1.
- a light 6 and a spectacle compartment 7 is arranged or formed on the housing cover 3 of the roof control unit 1.
- a microphone arrangement 8 with a microphone 9 is integrated in the roof control unit 1.
- the microphone assembly 8 and the microphone 9 is arranged approximately centrally in the roof control unit 1.
- To the microphone 9 includes a microphone capsule 10, which - in addition to the other electronic components 5 - on the interior 11 of the roof control unit 1 facing surface of the circuit board 4 is arranged. Between the arranged on the housing body side printed circuit board 4 microphone capsule 10 on the one hand and the housing cover 3 on the other hand extends through the interior 11 of the roof control unit 1, a sound channel 12 of the microphone assembly 8, said sound channel 12 forms an opening on the outer surface of the housing cover 3.
- a seal 13 is arranged between the microphone capsule 10 facing edge of the sound guide channel 12.
- the sound guide channel 12 of the microphone assembly 8 connects the arranged on the housing body side circuit board 4 of the roof control unit 1 microphone capsule 10 of the microphone 9 acoustically with the outside world or the motor vehicle interior.
- the in the Figures 1 and 2 illustrated embodiment of the microphone assembly 8 according to the invention is similar to the sound guide channel 12 of the microphone assembly 8 a cylindrical tube.
- the pipe resonances occurring during operation of the microphone 9 are based on the formation of standing waves.
- the sound guide channel 12 has a length which corresponds to about ⁇ / 4. Accordingly, the damper disk 4 in the case of the sound duct 12 of the in FIG. 3 illustrated embodiment of the microphone assembly 8 in the arranged the housing cover 3 through the opening surface, in which the speed of sound of the standing wave is located.
- a respective damper 14 is disposed at the first Schallschnellemaximum and at the second Schallschnellemaximum, the latter in the housing cover 3 of the roof control unit 1 opening of the sound guide channel 12th is present.
- the length of the sound guide channel 12 is about 5 ⁇ / 4, in the first sound velocity maximum, in the second sound velocity maximum and the third Schallschnellemaximum each a damper disc 14, wherein the third Schallschnellemaximum in the region of the housing cover 3 opening through the Sound guide channel 12 is present.
- the damper discs 14 forming damping material consists for example of an open-cell foam, such as Basotect, or other material by means of which the kinetic energy of air flowing through this material air molecules into heat energy convertible and thereby the ultrasonic velocity is damped.
- an open-cell foam such as Basotect
- Glass wool and foams as well as sintered metals, eg Felt-Metal, have proven to be suitable materials for this purpose. Some of these materials are also suitable, the housing cover 3 of the roof control unit 1 through opening of the sound guide channel 12 of the microphone assembly eighth provided with a comparatively rigid contact protection when the arranged there damper plate 14 is made of the material in question.
- the damping disks 14 formed from this damping material or material are just thick enough to bring about a sufficient reduction of the sound velocity of the standing wave in the region of the maximum speed of sound; At the same time, however, the damping disks 14 are thin enough not to dampen the sound passing through them as an incident wave altogether.
- the sound guide channel 12 of the microphone assembly 8 according to the invention according to the in the FIGS. 6 to 10 embodiments shown be configured such that the sound in the region of the housing cover 3 of the roof control unit 1 is led out by an opening configured as a horn or funnel opening portion of the sound guide channel 12 through the housing cover 3 from the roof control unit 1.
- the sound guide channel 12 extends starting from the microphone capsule 10 in the form of a conical funnel.
- the extension of the sound guide channel 12 takes place starting from the microphone capsule 10 in the form of a stepped funnel.
- FIGS. 9 and 10 different embodiments of the sound guide channels 12 of two microphone arrangements 8 shown there are shown, as in the case of the in FIG. 9 shown microphone assembly 8 of the sound guide channel 12 extends funnel-shaped starting from the microphone capsule 10 over the entire length of the sound guide channel 12, whereas in the case of in FIG. 10 shown embodiment of the microphone assembly 8, the funnel-shaped extension of the sound guide channel 12 begins only at a relatively large distance from the microphone capsule 10.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Eine Mikrofonanordnung (8) für den Innenraum eines Kraftfahrzeugs hat ein Mikrofon (9), das eine Mikrofonkapsel (10) aufweist, die auf einer Leiterplatte (4) angeordnet ist, die im Inneren (11) einer im Innenraum des Kraftfahrzeugs angeordneten Baugruppe (1), z.B. im Inneren (11) einer Dachbedieneinheit (1), untergebracht ist.Um die Mikrofonanordnung (8) möglichst kostengünstig in eine ohnehin in einem Kraftfahrzeuginnenraum vorhandene Baugruppe, z.B. in die Dachbedieneinheit (1), zu integrieren, wird vorgeschlagen, dass die Mikrofonanordnung (8) einen Schallführungskanal (12) aufweist, mittels dem die Mikrofonkapsel (10) des Mikrofons (9) akustisch mit einer Außenfläche der Baugruppe (1) verbunden ist, und dass der Schallführungskanal (12) an einer oder an mehreren Positionen Dämpfungsmaterialelemente aufweist, mittels denen Resonanzen des Schallführungskanals (12) unterdrückbar sind.A microphone arrangement (8) for the interior of a motor vehicle has a microphone (9) which has a microphone capsule (10) which is arranged on a printed circuit board (4) which is arranged inside (11) an assembly (1 ), e.g. in the interior (11) of a roof control unit (1). To integrate into the roof control unit (1), it is proposed that the microphone arrangement (8) has a sound guide channel (12), by means of which the microphone capsule (10) of the microphone (9) is acoustically connected to an outer surface of the assembly (1), and that the sound guide channel (12) has damping material elements at one or more positions, by means of which resonances of the sound guide channel (12) can be suppressed.
Description
Die Erfindung bezieht sich auf eine Mikrofonanordnung für den Innenraum eines Kraftfahrzeugs, mit einem Mikrofon, das eine Mikrofonkapsel aufweist, die auf einer Leiterplatte angeordnet ist, die im Inneren einer im Innenraum des Kraftfahrzeugs angeordneten Baugruppe, z.B. im Inneren einer Dachbedieneinheit, untergebracht ist.The invention relates to a microphone assembly for the interior of a motor vehicle, comprising a microphone having a microphone capsule, which is arranged on a printed circuit board, which in the interior of an assembly arranged in the interior of the motor vehicle, e.g. inside a roof control unit, is housed.
Mikrofone, die im Innenraum eines Kraftfahrzeugs untergebracht sind, sollen optisch möglichst unauffällig in Interieurteile integriert sein, wobei als Interieurteile oft aus wirtschaftlichen Gründen ohnehin im Kraftfahrzeuginnenraum vorhandene Baugruppen genutzt werden sollen, z.B. Dachbedieneinheiten. Die Mikrofonkapsel ist daher üblicherweise auf der innerhalb der Baugruppe bzw. der Dachbedieneinheit befindlichen Leiterplatte positioniert. Aufgrund dieser Positionierung der Mikrofonkapsel und aufgrund der üblichen Positionierung der Leiterplatte innerhalb der Baugruppe bzw. der Dachbedieneinheit ergibt sich ein räumlicher Abstand zwischen der Mikrofonkapsel einerseits und der Außenfläche der Baugruppe bzw. der Dachbedieneinheit andererseits. Diese räumliche Beabstandung kann zu erheblichen Qualitätseinbußen beim Betrieb der Mikrofonanordnung führen.Microphones, which are housed in the interior of a motor vehicle, should be optically unobtrusive integrated into interior parts, which are used as interior parts often for economic reasons already existing in the vehicle interior modules, eg roof control units. The microphone capsule is therefore usually positioned on the circuit board located within the module or the roof control unit. Due to this positioning of the microphone capsule and due to the usual positioning of the printed circuit board within the module or the roof control unit, there is a spatial distance between the microphone capsule on the one hand and the outer surface of the module or the roof control unit on the other. This spatial spacing can lead to significant quality losses in the operation of the microphone assembly.
Ausgehend von dem vorstehend geschilderten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, die eingangs geschilderte gattungsgemäße Mikrofonanordnung für den Innenraum eines Kraftfahrzeugs derart weiterzubilden, dass einerseits eine mit einem geringen technisch-konstruktiven Aufwand einhergehende Integration der Mikrofonanordnung in ohnehin im Kraftfahrzeuginnenraum vorhandene Baugruppen, z.B. in eine Dachbedieneinheit, möglich ist, wobei andererseits gewährleistet sein soll, dass ein höchsten akustischen Qualitätsansprüchen genügender Betrieb der Mikrofonanordnung gesichert werden soll.Based on the above-described prior art, the invention has the object, the above-described generic microphone assembly for the interior of a motor vehicle such that on the one hand with a small technical and design effort accompanying integration of the microphone assembly in existing anyway in the vehicle interior modules, e.g. in an overhead control unit, is possible, on the other hand, to ensure that a highest acoustic quality requirements sufficient operation of the microphone assembly to be secured.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Mikrofonanordnung einen Schallführungskanal aufweist, mittels dem die Mikrofonkapsel des Mikrofons akustisch mit einer Au-ßenfläche der Baugruppe verbunden ist, und dass der Schallführungskanal an einer oder mehreren Positionen Dämpfungsmaterialelemente aufweist, mittels denen Resonanzen des Schallführungskanals unterdrückbar sind. Entsprechend werden im Falle der vorstehend geschilderten erfindungsgemäßen Ausgestaltung der Mikrofonanordnung Dämpfungen im Bereich lokaler Schallschnellemaxima- realisiert.This object is achieved in that the microphone assembly comprises a sound guide channel, by means of which the microphone capsule of the microphone is acoustically connected to an outer surface of the assembly, and that the sound guide channel has at one or more positions damping material elements by means of which resonances of the sound guide channel can be suppressed , Accordingly, in the case of the above-described embodiment of the microphone arrangement according to the invention, damping is realized in the region of local sound velocity maxima.
Die Dämpfungsmaterialelemente lassen sich vorteilhaft als Dämpfscheiben ausgestalten und können dann mit einem vergleichsweise geringen Aufwand im Schallführungskanal an den seinen Schallschnellemaxima entsprechenden Positionen angeordnet werden.The damping material elements can be designed advantageously as a damping discs and can then be arranged with a comparatively little effort in the sound guide channel at its corresponding Schallschnellemaxima positions.
Als als Dämpfungsmaterial der Dämpfungsmaterialelemente bzw. Scheiben besonders geeignete Werkstoffe haben sich offenporige Schaumstoffe, wie Basotect, Glaswolle, gesintertes Metall, wie Felt-Metal, erwiesen; diesen Werkstoffen ist gemeinsam, dass mittels ihnen schallschnelle Bewegungsenergie in thermische Energie umwandelbar ist, indem die Bewegungsenergie durch die genannten Werkstoffe hindurchströmender Luftmoleküle in Wärmeenergie umgewandelt wird.As the damping material of the damping material elements or discs particularly suitable materials have open-cell foams, such as Basotect, glass wool, sintered metal, like Felt-Metal, proven; These materials have in common that by means of them sound-fast kinetic energy is convertible into thermal energy by the kinetic energy is converted by the above-mentioned materials through flowing air molecules into heat energy.
Vorteilhaft ist die Dickenabmessung der Dämpfscheiben gerade so gewählt, dass mittels der Dämpfscheiben eine ausreichende Dämpfung der Resonanz durch eine stehende Welle und eine hinreichend geringe Dämpfung einer einmalig durch die Dämpfscheibe hindurchtretenden Schallwelle bewirkbar ist.Advantageously, the thickness of the damping discs is just chosen so that by means of the damping discs sufficient damping of the resonance by a standing wave and a sufficiently low attenuation of a once passing through the damper sound wave can be effected.
Um einen Eindring- und Berührungsschutz am ausgangsseitigen Ende des Schallführungskanals mit einem geringen Aufwand zu realisieren, ist es vorteilhaft, wenn der Werkstoff des Dämpfungsmaterials ausreichend biegesteif ist, um am der Außenfläche der Baugruppe zugeordneten Endabschnitt des Schallführungskanals diese Effekte zur Verfügung zu stellen.In order to realize a penetration and contact protection at the output end of the sound guide channel with little effort, it is advantageous if the material of the damping material is sufficiently rigid in order to provide these effects on the outer surface of the module associated end portion of the sound guide channel.
Gemäß einer ersten Ausführungsform kann der Querschnitt des Schallführungskanals über dessen Länge konstant sein.According to a first embodiment, the cross section of the sound guide channel can be constant over its length.
Alternativ ist es möglich, dass sich der Querschnitt des Schallführungskanals mit zunehmendem Abstand zur Mikrofonkapsel vergrößert. Gemäß einer vorteilhaften Weiterbildung der erfindungsgemäßen Mikrofonanordnung ist der Schallführungskanal trichterförmig und der Trichterumfang am der Mikrofonkapsel abgewandten äußeren Ende des Schallführungskanals größer als die zu nutzende Wellenlänge.Alternatively, it is possible that the cross section of the sound guide channel increases with increasing distance to the microphone capsule. According to an advantageous development of the microphone arrangement according to the invention, the sound guide channel is funnel-shaped and the funnel circumference at the outer end of the sound guide channel facing away from the microphone capsule is greater than the wavelength to be used.
Des Weiteren kann vorteilhaft die Länge des trichterförmigen Schallführungskanals größer als die Hälfte der zu nutzenden Wellenlänge sein.Furthermore, advantageously, the length of the funnel-shaped sound guide channel can be greater than half the wavelength to be used.
Gemäß einer Weiterbildung der erfindungsgemäßen Mikrofonanordnung kann sich der Querschnitt des trichterförmigen Schallführungskanals mit zunehmendem Abstand zur Mikrofonkapsel linear, konisch, stufenweise, exponentiell, bilinear oder hyperbolisch erweitern.According to a development of the microphone arrangement according to the invention, the cross-section of the funnel-shaped sound guide channel can expand linearly, conically, stepwise, exponentially, bilinearly or hyperbolic with increasing distance to the microphone capsule.
Des Weiteren sind Ausführungsformen möglich und vorteilhaft, bei denen sich der Querschnitt des Schallführungskanals ab einem vorgebbaren Abstand zur Mikrofonkapsel trichterförmig erweitert.Furthermore, embodiments are possible and advantageous in which the cross section of the sound guide channel widens in a funnel shape from a predeterminable distance to the microphone capsule.
Gemäß einer weiteren Ausprägung kann sich an der Position des Übergangs von konstantem zu sich erweiterndem Querschnitt eine Dämpfscheibe befinden.According to another embodiment, a damper disk may be located at the position of the transition from constant to flared cross-section.
Den vorstehend geschilderten Ausführungsformen des Schallführungskanals der erfindungsgemäßen Mikrofonanordnung ist gemeinsam, dass sie - je nach Anforderungsprofil - in hervorragender Weise geeignet sind, die im Inneren der Baugruppe bzw. der Dachbedieneinheit angeordnete Mikrofonkapsel der Mikrofonanordnung so an die Außenwelt bzw. den Innenraum des Kraftfahrzeugs anzuschließen, dass bei der Übertragung von Schall zwischen dem Innenraum des Kraftfahrzeugs und der Mikrofonkapsel möglichst keine Störungen auftreten.The above-described embodiments of the sound guide channel of the microphone assembly according to the invention has in common that they - depending on the requirements - are well suited to connect the arranged inside the module or the roof control unit microphone capsule of the microphone assembly to the outside world or the interior of the motor vehicle, that in the transmission of sound between the interior of the motor vehicle and the microphone capsule as possible no interference.
Im Folgenden wird die Erfindung anhand von Ausführungsformen unter Bezugnahme auf die Zeichnung näher erläutert.In the following the invention will be explained in more detail by means of embodiments with reference to the drawing.
Es zeigen:
Figur 1- eine im Innenraum eines Kraftfahrzeugs verbaute Dachbedieneinheit mit einer erfindungsgemäßen Mikrofonanordnung;
Figur 2- eine Prinzipdarstellung der in
innerhalb der Dachbedieneinheit gezeigten Mikrofonanordnung;Figur 1 - Figuren 3 - 5
- Darstellungen unterschiedlich ausgestalteter erfindungsgemäßer Mikrofonanordnungen zur Verdeutlichung der Lage von Schallschnellemaxima in denselben; und
- Figuren 6 - 10
- Darstellungen unterschiedlicher Ausführungsformen der erfindungsgemäßen Mikrofonanordnung.
- FIG. 1
- a built-in interior of a motor vehicle roof control unit with a microphone assembly according to the invention;
- FIG. 2
- a schematic representation of in
FIG. 1 microphone assembly shown within the roof control unit; - Figures 3 - 5
- Representations of differently designed inventive microphone arrangements for clarifying the position of sound velocity maxima in the same; and
- FIGS. 6 to 10
- Representations of different embodiments of the microphone assembly according to the invention.
An der Innenseite des Gehäusekörpers 2 der Dachbedieneinheit 1 ist eine Leiterplatte 4 angeordnet, an der diverse elektronische Bauteile 5 der Dachbedieneinheit 1 sitzen.On the inside of the
Im dargestellten Ausführungsbeispiel ist am Gehäusedeckel 3 der Dachbedieneinheit 1 eine Leuchte 6 und ein Brillenfach 7 angeordnet bzw. ausgebildet.In the illustrated embodiment, a light 6 and a spectacle compartment 7 is arranged or formed on the
Des Weiteren ist in die Dachbedieneinheit 1 eine Mikrofonanordnung 8 mit einem Mikrofon 9 integriert. Im dargestellten Ausführungsbeispiel ist die Mikrofonanordnung 8 bzw. das Mikrofon 9 etwa mittig in der Dachbedieneinheit 1 angeordnet.Furthermore, a
Zu dem Mikrofon 9 gehört eine Mikrofonkapsel 10, die - neben den weiteren elektronischen Bauteilen 5 - auf der dem Inneren 11 der Dachbedieneinheit 1 zugewandten Fläche der Leiterplatte 4 angeordnet ist. Zwischen der an der gehäusekörperseitigen Leiterplatte 4 angeordneten Mikrofonkapsel 10 einerseits und dem Gehäusedeckel 3 andererseits erstreckt sich durch das Innere 11 der Dachbedieneinheit 1 ein Schallführungskanal 12 der Mikrofonanordnung 8, wobei dieser Schallführungskanal 12 an der Außenfläche des Gehäusedeckels 3 eine Öffnung bildet.To the
Zwischen der der Mikrofonkapsel 10 zugewandten Kante des Schallführungskanals 12 ist eine Dichtung 13 angeordnet.Between the
Der Schallführungskanal 12 der Mikrofonanordnung 8 verbindet die an der gehäusekörperseitigen Leiterplatte 4 der Dachbedieneinheit 1 angeordnete Mikrofonkapsel 10 des Mikrofons 9 akustisch mit der Außenwelt bzw. dem Kraftfahrzeuginnenraum. Bei dem in den
In
Im Falle der in
Entsprechend sind bei der in
Das die Dämpfscheiben 14 ausbildende Dämpfungsmaterial besteht beispielsweise aus einem offenporigen Schaumstoff, wie beispielsweise Basotect, oder einem anderen Werkstoff, mittels dem die Bewegungsenergie von durch diesen Werkstoff hindurchströmenden Luftmolekülen in Wärmeenergie umwandelbar und dadurch die Schallschnellebewegung dämpfbar ist. Als geeignete Werkstoffe hierfür haben sich auch Glaswolle und Schäume sowie gesinterte Metalle, z.B. Felt-Metal, herausgestellt. Einige dieser Werkstoffe sind darüber hinaus geeignet, die den Gehäusedeckel 3 der Dachbedieneinheit 1 durchbrechende Öffnung des Schallführungskanals 12 der Mikrofonanordnung 8 mit einem vergleichsweise biegesteifen Berührungsschutz zu versehen, wenn die dort angeordnete Dämpfscheibe 14 aus dem betreffenden Werkstoff hergestellt ist.The
Die aus diesem Dämpfungsmaterial bzw. -werkstoff ausgebildeten Dämpfscheiben 14 sind gerade dick genug, um im Bereich des Schallschnellemaximums eine ausreichende Reduktion der Schallschnelle der stehenden Welle herbeizuführen; gleichzeitig sind die Dämpfscheiben 14 aber dünn genug, um den durch sie als einfallende Welle hindurchtretenden Schall insgesamt nicht zu stark zu dämpfen.The
Bei vergleichsweise langen Schallführungskanälen 12 und/oder bei einer frequenzmäßig breitbandigen Anwendung müssen entsprechend viele Dämpfscheiben 14 eingesetzt werden. Hierdurch könnte eine unerwünscht hohe Gesamtdämpfung entstehen. Um diesem Effekt entgegenzuwirken, kann der Schallführungskanal 12 der erfindungsgemäßen Mikrofonanordnung 8 gemäß den in den
Im Falle der in
Entsprechend erfolgt die Erweiterung des Schallführungskanals 12 im Falle der in
In den
Claims (12)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018000834.8A DE102018000834A1 (en) | 2018-02-01 | 2018-02-01 | Microphone arrangement for the interior of a motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3522564A1 true EP3522564A1 (en) | 2019-08-07 |
Family
ID=65023690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19000022.4A Withdrawn EP3522564A1 (en) | 2018-02-01 | 2019-01-11 | Microphone assembly for the interior of a motor vehicle |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3522564A1 (en) |
| DE (1) | DE102018000834A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202021102849U1 (en) | 2021-05-26 | 2022-08-30 | Paragon Gmbh & Co. Kgaa | external microphone |
| DE102021113507A1 (en) | 2021-05-26 | 2022-12-01 | Paragon Gmbh & Co. Kgaa | external microphone |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023200511A1 (en) | 2023-01-24 | 2024-07-25 | Robert Bosch Gesellschaft mit beschränkter Haftung | Acoustic device, housing body for an acoustic device and method for producing an acoustic device and a housing body |
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| US20040028239A1 (en) * | 1999-11-19 | 2004-02-12 | Watson Alan R. | Vehicle accessory microphone assembly having a windscreen with hydrophobic properties |
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| DE102013001385A1 (en) * | 2013-01-26 | 2014-07-31 | Audi Ag | Motor vehicle and microphone for a microphone assembly in the motor vehicle |
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| DE102015203542A1 (en) * | 2015-02-27 | 2016-09-01 | Sennheiser Electronic Gmbh & Co. Kg | microphone unit |
| JP2017183911A (en) * | 2016-03-29 | 2017-10-05 | パナソニックIpマネジメント株式会社 | microphone |
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| JPS58155186U (en) * | 1982-04-12 | 1983-10-17 | 日立電子株式会社 | Support structure of microphone unit for television camera |
| US6976973B1 (en) * | 2000-10-12 | 2005-12-20 | Baxter International Inc. | Peritoneal dialysis catheters |
| JP2007168686A (en) * | 2005-12-26 | 2007-07-05 | Kojima Press Co Ltd | On-vehicle microphone device |
| JP2017175284A (en) * | 2016-03-22 | 2017-09-28 | 京セラ株式会社 | Electronic apparatus |
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2018
- 2018-02-01 DE DE102018000834.8A patent/DE102018000834A1/en not_active Ceased
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2019
- 2019-01-11 EP EP19000022.4A patent/EP3522564A1/en not_active Withdrawn
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|---|---|---|---|---|
| JPH0566782A (en) * | 1991-09-09 | 1993-03-19 | Nissan Motor Co Ltd | Active muffler for vehicle room |
| WO1997042745A1 (en) * | 1996-05-03 | 1997-11-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Michrophone in a speech communicator |
| US20040028239A1 (en) * | 1999-11-19 | 2004-02-12 | Watson Alan R. | Vehicle accessory microphone assembly having a windscreen with hydrophobic properties |
| US20070025576A1 (en) * | 2005-07-26 | 2007-02-01 | Wen Yung C | Telescope style microphone with dual effects for enhancing physical acoutsic volume and acquiring uni-directional acoustic source |
| JP2009194734A (en) * | 2008-02-15 | 2009-08-27 | Toyota Motor Corp | Microphone structure |
| EP2328141A2 (en) * | 2009-11-30 | 2011-06-01 | Yamaha Corporation | Acoustic resonator and sound chamber |
| DE102013001385A1 (en) * | 2013-01-26 | 2014-07-31 | Audi Ag | Motor vehicle and microphone for a microphone assembly in the motor vehicle |
| US20140270206A1 (en) * | 2013-03-15 | 2014-09-18 | Timothy Alan PORT | Acoustic transmissivity impairment determining method and apparatus |
| DE102015203542A1 (en) * | 2015-02-27 | 2016-09-01 | Sennheiser Electronic Gmbh & Co. Kg | microphone unit |
| JP2017183911A (en) * | 2016-03-29 | 2017-10-05 | パナソニックIpマネジメント株式会社 | microphone |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202021102849U1 (en) | 2021-05-26 | 2022-08-30 | Paragon Gmbh & Co. Kgaa | external microphone |
| DE102021113507A1 (en) | 2021-05-26 | 2022-12-01 | Paragon Gmbh & Co. Kgaa | external microphone |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018000834A1 (en) | 2019-08-01 |
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