FR2513841A1 - HEARING APPARATUS FOR EDUCATIONAL LABORATORY - Google Patents

Abstract

THE INVENTION RELATES TO A PEDAGOGICAL LABORATORY HEARING APPARATUS. THIS APPARATUS INCLUDES A TEACHER PORTABLE TRANSMITTER 20 INCLUDING AN ELEMENT FOR TRANSMITTING A HIGH FREQUENCY CARRIER SIGNAL WITHIN A TEACHING SETTING, AT LEAST ONE STUDENT PORTABLE RECEIVER 30 INTENDED TO OPERATE IN THIS SETTING AND INCLUDING A TELEMEASURE ELEMENT DESIGNED TO EMIT A SIGNAL REPRESENTING THE OPERATING STATE OF THIS RECEIVER 30, SO THAT THE TEACHER 21 CAN BE ADVISED OF THE SUITABILITY OF THE STUDENT 31 TO RECEIVE INSTRUCTIONAL COMMUNICATIONS. THE INVENTION IS USED TO TEACH PEOPLE WITH SEVERE HEARING Impairment.

Description

The present invention relates to an apparatus

  auditory laboratory and, more specifically,

  firstly, it relates to educational laboratories

  belonging to the class in which both the

  telling that the students are traveling and in the-

  what a variety of learning situations are

  seen in the framework of use of a teaching laboratory In a type of system, students with significant hearing impairments,

  may receive communications through the

  portable radio receivers which are

  The teacher is equipped in the same way with a transmitter powered by

  battery In the context of using this class

  pedagogical laboratories, the teacher must

  be informed of the integrity of the communications system

  because he can not always tell from the students' reactions to an instruction

  if it has been received or not.

  In the context of using a laboratory

  auditory pedagogy specific to the prior art

  of which the Applicant is aware, a teacher

  is equipped with a radio microphone which transmits to a transponder, which transmits

  teaching subjects at radio study receivers.

  can also be used as hearing aids With this system, the teacher

  had no way of knowing the state of functioning

  instruments available to students

  and therefore he was not in a position to interpret

  the reaction of the latter to a set of

given instructions.

  In the teaching laboratory apparatus of

  the present invention, there is provided a tele-

  a measure for informing the teacher of the integrity of the system with respect to the state or ability of the student to receive communications In one embodiment of the present invention,

  a visual telemetry element is used to

  Provide the teacher with an indication of the interest

  operating system of a high-level communications system

  the frequency and / or operating status of an

  battery operation for instrumentation

  Portable ception for students Other types of telemetry elements can also be

  implemented to warn the teacher of various

  malfunctions that may occur in an eys-

  communication system, as well as to monitor the integrity of the operating state at

what time of the program.

  In a system of this type, a lamp of

  is provided on a portable student receiver to provide a visual indication of the operating status of

  high frequency of the student's instrument in detecting

  both the prolonged reception of the relevant radio signal

  from the transmitter of the teacher and react

  to a condition causing the extinction of a

  light-emitting diode fault indicator.

  These different objects of the present invention

  as well as others will appear on reading

  the description and the claims below, in

  Referring to the accompanying drawings in which: Figure 1 is a plan view from above of a framework for use of an auditory educational laboratory; Figure 2 is a partial front view of a teacher for the laboratory; Figure 3 is a partial front view of a student laboratory; and FIG. 4 is a block diagram of a communications system for use in the laboratory. Referring to FIGS. 1, 2 and 3, a teacher is generally designated by the reference numeral 21 and a student is generally designated by the reference numeral 31 In the illustrated embodiment, a frequency modulation transmitter 20 having

  an antenna 22 is supported around the neck of the person

  is a teacher 21 by means of a Lavallière or ana-

  In the same way, a hearing aid and combined frequency radio receiver (generally referred to as reference numeral 30) is carried by a student.

  the illustrated embodiment, the receiver 30 com-

  takes an earphone 32 connected, via a cable 33, to a

  student receiver 30, an electronic diode indicator

  luminescent without frequency modulation 34, an indi-

  low battery 19, as well as an antenna 35

  specifically incorporated in the cable 33 The receiver

  30 may be supported on the body of a student by appropriate means such as a harness, a clip

  of a belt, a Lavallière or the like -

  As can be appreciated, in the

  use of the laboratory shown in Figure 1,

  the teacher and several students are

  ciently mobile and can intervene in one or the other of the various learning activities in

  different locations throughout the working area.

  To a certain extent determined by the de-

  ficiences of hearing individual students, the

  student receivers 30 can operate at the same time as

  high-powered hearing instruments or, as is specifically the case, part of a frequency modulation communications system A frequency modulation system which has been used in operational systems implementing principles of the present invention, can operate in the frequency spectrum

  by the Federal Commission of Com-

  United States Government in the 7276 MHz band, and the transmitter includes a suitable microphone (not shown) and an antenna 22 for propagating the modulated signal.

  frequency in the context of using the laboratory.

  re. Student receivers include

  a frequency-modulated processing circuit des-

  to convert the received signals into a sound signal which is then applied to the organs of the

  students, specifically via a receiver 32 This re-

  Receptor 32 may also be excited from a high power hearing aid disposed internally (not shown), from a recording source of acoustic program material.

  or any other program program environment

  Both the transmitter and the receivers are

  specifically battery powered.

  Referring now to Figure 4 in the lower left corner of which are illustrated

  a teacher transmitter 20 and its antenna 22, a

  student container 30 being contained in the remaining portion of the drawing as delimited by a

line in broken lines.

  This receiver 30 includes a front end

  receiver 36 connected to an antenna 35, and

  closes an appropriate circuit and equipment to convert any FM signal picked up

  at a lower intermediate frequency specific-

  called the first intermediate frequency, which

  will be subject to further processing of the

  described below The front end 36 can

  be excited from an appropriate energy source

  provided (not shown) in the form of a battery or the like.

  An integrated circuit chip with frequency

  intermediate and low power

  by a broken line designated by

the reference figure 37.

  This integrated circuit 37 comprises an output terminal 9, a filter input terminal 10, a terminal

  filter output 11, a trigger input terminal

  12, a damping input terminal 14, a

  ground terminal 15, as well as an earth terminal 15

  16 connected to the output of the front end

  of reception 36 via a conductor 18 The circuit

  plate 37 also includes a filter amplifier.

  trage active 38 connected between terminals 10 and 11, and a trigger amplifier 39 connected

  between the terminal 12 and a terminal 41 of a switch 40.

  The output terminal 9 of the integrated circuit 37 is connected to a receiver 32 via a conductor 45, a terminal 46, a resistor 47, a conductor 48, a

  terminal 49, a low-frequency receiving amplifier

  44 and a conductor 33 The terminal 49 is connected

  grounded via a capacitor 50 The terminal 9 of the integrated circuit 37 is also connected to the filter input terminal 10 via the conductor 45, the terminal 46, a capacitor 51, a resistor 52, a terminal 53, a capacitor 54 and a terminal 55 A resistor 56 is connected between the filter terminals and 11 of the integrated circuit 37 via a terminal 57 and a conductor 62 A capacitor 61 is connected between the terminals 53 and 57 via a conductor 58 and a terminal

  59, which is connected to the ground via a resistor

  The filter output terminal 11 of integrated circuit 37 is connected to trigger terminal 12 via lead 62, terminal 57, lead 63, terminal 64, diode 77, terminal 66 and lead 65. diode 77 is connected in series with a diode 76, as well as to ground via terminals 72 and 75, as well as a capacitor 74 with which is

  connected in parallel a resistor 73; a condensation

  69 and a resistor 68 are connected in parallel.

  across the diodes 77 and 76, while the

  terminal 75 is connected to a source of positive potential

  tif (terminal 84) via terminal 72, a terminal 71, a

  driver 70, a resistor 81 and a terminal 83

  damping switch terminal 14 of the circuit

  37 is connected to terminal 49 via a

  80, a terminal 79 and a conductor 78 The damping terminal 14 of the integrated circuit 37 is connected to the fixed contact 42 of the switch 40, while the ground terminal 15 of the integrated circuit 37 is

  connected to the movable contact 43 of this switch 40.

  As illustrated in the upper right part of FIG. 4, two transistors 88 and 95 are

  connected to control the excitation of an electrical diode

  The base 89 of the transistor 88 is connected to the terminal 83 via a resistor 87, a terminal 86 and a resistor 85; the collector 91 of the transistor 88 is connected to the positive terminal 84 via

  a resistor 93, while the transmitter 90 is connected

  The base 96 of the transistor 95 is connected to the collector 91 of the transistor 88 via a conductor 94 and a terminal 92; the collector 98 of the transistor 95 is connected to a positive potential source (terminal 101) via a resistor 100 and the electroluminescent diode 34, while the emitter 97 is connected to the ground via a conductor 99.

  86 between the resistors 85 and 87 is connected

  at terminal 14 of integrated circuit 37 via the terminal

79 and the driver 80.

  The following table gives the values of the relevant components for the embodiment

illustrated in Figure 4.

  Reference number 4 56 73 85 and 95

100

Component

Semiconductor integrated circuit

  CS 188 cherry conductor and Litronix LD 36 C light emitting diode Litronix LD 32-2 light emitting diode Motorola P / N type MC 3357 integrated circuit 10 Kohms capacitor 0.001 p capacitor F 0.0047 / u F capacitor 5.6 Kbh resistor Condenser 120 p F Resistance 180 Kohms Resistance 2.7 khms Capacitor 120 p F Resistance 100 Kohms Capacitor 10 / u F Resistance 22 kohms Capacitor l, 0 F diode type IN 4148 diode type IN 4148 Resistance of 39 Kohms Resistance of 100 Kohms Resistance of 100 Kohms Pair of type transistors

SGS L 159 M 3

  Resistance of 56 Kohms Resistance of 820 ohms

  It can be assumed that one or more

  children and several students are present

  in a laboratory use setting as it-

  lustrous in Figure 1; it can also be assumed that the teachers are in possession of a transmitter 20 which they have control and that each student is in the same way in possession of a receiver 30 which he also controls The instruments are intended to be ready to operate with the transmission and reception elements excited by

  batteries in each of the units A signal

  telemetry code to indicate a low battery

  may be present in one or more of the instruments

  ment, and the teacher is able to discern and remedy this failure before continuing with a teaching program.

  all the portable units are in an operational state

  the teacher continues to communicate with students through the modulation system.

  If each of the student receivers re-

  receives a signal transmitted, the signaling lamp 34 of the telemetry visual element (which, preferably, may be red in color and is provided on each

  student receivers) is not switched on and the

  can then continue to communicate with students with the assurance that messages and

  instructions are received by them.

  In summary, when the transmitter 20 is suitable

  excited, a carrier wave of a pre-

  determined is spread throughout the entire context of

  of the laboratory and it is transmitted to each of the student receivers 30 The frequency of this wave

  carrier is converted to a first inter-

  medial in the front end of reception 36 and is routed to the input terminal 16 of the second

251384 1

  intermediate frequency integrated circuit 37 via the

  The second specific conversion operation

  detection and detection is performed by parts of the integrated circuit 37 which are not indicated in the drawing, but which provide, at the terminal 9, an output

  may contain modulation and other

  signal, which is in turn routed to amplifier 44 and the receiver or receiver 32

  arranged to stimulate the organs of the ear of a

  The output at terminal 9 is also

  applied to terminal 12 of integrated circuit 37 via

  the filter amplifier 38 and a conventional converter

  alternating current / direct current The filter amplifier and the components connecting terminal 9 to 1 S terminal 10 include a bandpass filter with a nominal frequency of 80 kHz. It can also be noted that the AC / DC converter operates to reduce the voltage at terminal 12 as the power of the output signal

  of the bandpass filter amplifier 38 increases.

  During normal communication with the system, the

  trigger 39 operates to actuate the switching

  40 in the position illustrated in FIG. 4.

  In case the exit appearing at terminal 9

  of the integrated circuit 37 contains a frequency component

  substantial quantization of 80 kHz, such as that normally

  encountered in the absence of a carrier signal at the transmission frequency of the frequency modulation system, or when other causes of interference occur, the output appearing at terminal 11

  of the integrated circuit 37 increases and the converter

  alternating current / direct current causes a reduction

  the potential appearing at terminal 12 in order to

  trigger, which then has the effect of

  setting the movable contact 43 of the switch on the fixed contact of the latter to ground the signal appearing at the terminal 9, as well as for exciting the light-emitting diode 34 by making the transistor

  88 non-conductive and transistor 95, conductive.

  The illumination of the light-emitting diode 34 will warn the teacher of the existence of a defect in

  functioning in the system, which must be correct

  before a communication can be re-established

  with the student using this particular receiver.

  Although, in the telemetry mode of a defect of

  functioning of the system according to the form of

  In the illustrated preferred embodiment, a visual communication medium is used. It may now be apparent to those skilled in the art that other forms of telemetry devices may be used to warn

  the teacher of the existence of functional defects

  described above in relation to the form of reali-

  illustrated illustration, as well as other failings

may occur.

  In the same way, the battery indicator

  expected low on student receivers 30 is-

  to provide an additional means of providing,

  to the teacher, telemetering information

  the student receivers 30, thereby guaranteeing

  the integrity of the communications of a teaching program

gnement. he

Claims (4)

  A radio-based instructional radio system comprising, in combination: a portable teacher transmitter comprising an element for transmitting a high frequency carrier signal within a teaching environment;   at least one portable student receiver   the receiver includes a telemetry element adapted to transmit at least one signal representing the operating status of the receiver, so that the teacher can be informed of the ability of   the student to receive instructional tion.   The system of claim 1, wherein   in that the telemetry element can function in a visual environment.   3 System according to claim 2, characterized   in that the telemetry element can function   in response to the presence of a carrier signal at high frequency.   Apparatus according to claim 3, characterized   characterized in that the student receiver includes an element for operating the telemetry element whenever the power of the carrier signal at a high   frequency is below a predetermined level.