EP0098421A2 - Dispositif aide-ouie électrique - Google Patents

Dispositif aide-ouie électrique Download PDF

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Publication number
EP0098421A2
EP0098421A2 EP83105876A EP83105876A EP0098421A2 EP 0098421 A2 EP0098421 A2 EP 0098421A2 EP 83105876 A EP83105876 A EP 83105876A EP 83105876 A EP83105876 A EP 83105876A EP 0098421 A2 EP0098421 A2 EP 0098421A2
Authority
EP
European Patent Office
Prior art keywords
sound
hearing aid
aid according
acoustic
phase
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.)
Granted
Application number
EP83105876A
Other languages
German (de)
English (en)
Other versions
EP0098421B1 (fr
EP0098421A3 (en
Inventor
Reinhard Kern
Gerhard Krauss
Helmut Schlosser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6167357&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0098421(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT83105876T priority Critical patent/ATE34899T1/de
Publication of EP0098421A2 publication Critical patent/EP0098421A2/fr
Publication of EP0098421A3 publication Critical patent/EP0098421A3/de
Application granted granted Critical
Publication of EP0098421B1 publication Critical patent/EP0098421B1/fr
Expired legal-status Critical Current

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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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/48—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using constructional means for obtaining a desired frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/59—Arrangements for selective connection between one or more amplifiers and one or more receivers within one hearing aid

Definitions

  • the invention relates to an electrical hearing aid according to the preamble of patent claim 1.
  • Such hearing aids often contain devices to emphasize individual frequency ranges and to lower others. This is because e.g. Hearing aids are needed which amplify high frequencies more than low ones in order to ensure adaptation to a specific hearing damage.
  • Such so-called high-frequency devices are currently e.g. were achieved in such a way that they were realized with special microphones (6 dB or 12 dB rise / octave in the frequency response) or amplifiers with a high-pass character (see, for example, book “Höretztechnik” by W. Güttner, Thieme-Verlag, Stuttgart 1978, pages 115 to 118).
  • the two aforementioned options have the disadvantage that the frequency response of the listener remains unchanged, so that when the hearing aid is fully controlled, it is not the acoustic setting but the effectiveness of the listener that is decisive for the frequency ranges supplied to the hearing impaired. In many hearing impaired people, however, the hearing loss is so great that the hearing aid must be adjusted to the maximum attainable output level. However, since the frequency response of the maximum output level largely corresponds to the effectiveness of the listener, this setting changes the frequency character of a tweeter when it approaches the modulation limit and it becomes broadband, so that the tweeter character is lost (see FIG. 2)
  • a hearing aid is known from the documents relating to DE-GM 17 39 043, which has two or more differently designed sound generators which complement one another with regard to their frequency ranges and which act on a common sound collecting arrangement which collects the sound.
  • this arrangement only results in an expansion of the frequency range in the sense of the greatest possible width of an acoustic frequency range that can be transmitted without a frequency response.
  • the invention is based, to maintain the originally set frequency character in a hearing aid according to the preamble of claim 1 even at maximum achievable output level. This object is achieved by the measures specified in the characterizing part of this claim.
  • the subclaims contain advantageous developments and refinements of the invention.
  • two hearing aids which are customary in hearing aids and are excited by the amplifier of the device can be used as the sound generator.
  • the acoustic outputs of these listeners are then united in a sound supply arrangement to the ear.
  • Acoustic means such as nozzles, filters etc., can be used for the adjustment in the derivations from the listeners and also in the sound supply arrangement.
  • changeable means for example in the form of a tap, into the lines by means of which their cross section can be changed.
  • the acoustic effect of the listeners can also be tuned by differently influencing the electrical excitation of the two listeners. Such a vote can take place, for example, by differently changing the volume emitted by the individual listeners. But it is also possible to use a separate power amplifier for each listener.
  • acoustic influencing elements can be inserted into the lines.
  • Such an element can also be, for example, a three-way valve which influences both the two lines from the sound transmitters and the line of the sound supply arrangement.
  • a hearing aid with only the simplest parts i.e. a microphone 1, an amplifier 2 and a receiver 3.
  • the frequency response curves shown in FIG. 2 can be achieved with such a device.
  • a frequency response curve 9 of the amplification and a frequency response curve of the maximum output level 15 are shown in broken lines. It is evident from this that, after amplification, higher frequencies are taken into account, but that at the maximum output level, low frequencies also appear at the output level, as already shown above.
  • the receiver 3 according to FIG. 1 is replaced by an arrangement 4 according to FIG. 3.
  • the arrangement 4 consists of two earphones 5 and 11 (of the same type) which are connected to a coupling piece 21 via switching lines 17 and 18 of different lengths.
  • An acoustic resistor 19 and / or 20 can be inserted into each of these connecting lines.
  • Similar resistors can also be introduced into the derivation and, for example, as such, which are denoted by 24 and 25 in FIG. 3, are located in the line 26, which connects to the coupling piece 21.
  • the actual derivation then takes place via a formwork line 28 and a channel 29 to the ear, which is replaced in FIG. 3 by a measuring device which comprises a coupler 31 and a microphone 32.
  • Figure 4 the arrangement of Figure 1 and Figure 3 is summarized and dressed in the representation of a Hd0 device.
  • This has a housing 4 'in which the microphone 1, the amplifier 2 and the arrangement 4 are located.
  • the line 26 In the support hook of the device 27 there is the line 26, to which the line 28 continues in the form of a formwork tube which opens into an earmold 30 which receives the channel 29, which is the actual connection to the ear 31.
  • the acoustic resistors 19, 20, 24 and 25 can consist of cross-sectional constricting inserts such as porous material, sieve-like inserts or other constrictions such as nozzles. With series of measurements can be determined what kind of acoustic resistors produces the desired effect in an individual case, just as the length and diameter can of S c hall channels 17, 18 are determined and 26th
  • the two earphones can be electrically connected to the output stage of the amplifier 2 in various ways in order to influence the sound reproduction. They can be operated either in series according to FIGS. 5 and 6 or in parallel according to FIGS. 7 and 8.
  • Technical criteria such as desired output power, existing impedance values of the listeners, internal resistance of the output stage etc., make one or the other version appear more favorable, i.e. e.g. with high power of the output stage and with low impedance of the listener a series connection
  • the output stage 56 of the amplifier 2 (FIG. 1) is connected according to FIGS. 5 and 6 with the connections 58 and 59 to the voltage supply of the hearing aid. From the output terminal 63 of the output stage, the output stage current (direct and alternating current) flows in succession through both earphones 5 and 11. In FIG. 5, both earphones are switched in such a way that the acoustic signals in phase and in accordance with the sound outlet ports 6 and 12 (FIG. 3) Figure 6 appear in phase opposition.
  • the receiver 11 can be bridged with a variable resistor 57. In position 61 of the tap 62, the current path in the actuator resistor 57 is interrupted. The entire output stage current also flows through the receiver 11. In position 60, the receiver 11 is short-circuited, and no signal occurs at the hearing support 12. For position 61 and structure according to FIG. 3 with circuit, this results in a frequency curve in FIG. 13 after curve 68, for position 60 curve 67, for position 61 from tap 62; Structure according to Figure 3 with circuit Figure 6 frequency response in Figure 14 after curve 69; Position 60 curve 67.
  • FIGS. 9 and 10 show a structure in which a push-pull circuit is used to excite the sound generator.
  • the listeners can only be operated in parallel.
  • the supply of the direct current to the output stage of 66 takes place via the center connection 10 of the push-pull receiver 7.
  • the connection 16 of the receiver 13 is not connected in FIGS. 9 and 10. Since the third connection is not used, a handset with only two connections can also be used.
  • the level in the receiver 13 can be regulated continuously via the actuator 57. Even when the push-pull circuit is used, it is possible to operate in the same way (FIG. 9) and in phase opposition (FIG. 10).
  • FIGS. 11 and 12 show two circuit variants, in each of which each of the two earphones, according to the earphone arrangement according to FIG. 3, is operated by its own power amplifier.
  • a circuit arrangement, called a phase shifter 81, is required to generate the two signals which are to be sent to the two output stages.
  • phase shifter circuit known per se and shown in FIG. 13 can be used as phase shifter 81.
  • the input voltage lies between an input 82 of the phase shifter circuit 81 and a ground line 59.
  • the signal reaches the base 97 of a transistor 94 via a decoupling capacitor 90.
  • the changing AC voltage at 97 generates an AC current through the collector-emitter path of the transistor 94.
  • This current also flows through a collector resistor 92 and an emitter resistor 93 of this stage. If the resistance values of 92 and 93 are chosen to be the same size, the alternating voltage falling thereon is also the same, the phase of these two voltages being shifted by 180 ° to one another. (Capacitors 98 and 100 only separate the different equals potentials of tension).
  • variable resistor 99 either only the voltage of the collector 96 of the transistor 94 - position 102 of the tap 101 (this voltage is 180 ° out of phase with the voltage at point 82) - or only the voltage of the emitter 95 - position 103 of the tap 101 (With the input voltage at 82 in phase) - or partial voltages, in the intermediate positions of the tap 101, are given to the output 84 of the phase shifter stage 81.
  • tap 101 is in the middle position on the resistance path of 99, no AC voltage is present at 84.
  • FIG. 11 shows an embodiment of the interconnection of a receiver arrangement according to FIG. 3 with two single-ended amplifiers 56 and 78, each of which supplies a single-ended receiver 5 and 7 with a signal: each of the amplifiers 56 and 78 is connected to the operating voltage supply 58 and 59, as is the + Connections 8+ and 11+ of the single-ended earphones 5 and 11.
  • the input voltage at 90 is also at the input 83 of the power amplifier 56.
  • the handset 5 is connected to connection 8-.
  • the output stage 78 receives the signal via the phase shifter circuit 81 at point 85, the output 80 is connected to the connection 14 of the receiver 11.
  • two push-pull earphones 7 and 13 can be connected together via two push-pull output stages 66 and 79 with a receiver arrangement according to FIG. 3 (FIG. 12):
  • the two power amplifiers 66 and 79 are connected to the supply voltage 58 and 59, as well as the center connections 10 and 16 of the G e gentakt Anlagener 7 and 13.
  • the receiver 7 is driven by a signal which is amplified without any influence in the final stage 66, while receiver 13 is driven via the amplifier 79th This signal is changed in magnitude and phase by the phase shifter circuit 81.
  • the advantage of the circuits according to FIGS. 11 and 12 - mechanical construction of the receiver arrangement according to FIG. 3 - is that one construction can achieve both effects, operation in phase and in phase: only by changing the position of the pickup of grinder 101 on variable resistor 99 from the low-frequency characteristic (in phase according to FIG. 13 curve 68) with stepless transition to the high-frequency characteristic (opposite phase according to FIG. 14 curve 69), all receiver frequency responses can be realized.
  • FIG. 13 The effect of the interconnections according to FIGS. 5 to 12 is shown in a diagram in FIG. 13 for in-phase operation and in FIG. 14 for operation in opposite phases.
  • the results were measured in a set-up which corresponds to that in FIG. 3.
  • the logarithm of the frequency is plotted on the abscissa and the acoustic output level in dB is plotted on the ordinate.
  • the curve 67 drawn in a continuous line then shows the frequency response of the arrangement when the listener 11 or 13 does not receive any signal.
  • the acoustic signals at the S c reverb outlet connections 6 and 12 occur in opposite phases. If the amplitudes are of equal size and the phase shift is exactly 180 °, the signals at coupling point 52 are completely canceled. This condition applies (17 and 18) only for very low frequencies. For increasing frequencies the level increases rapidly because no phase delays occur for the sound channel lengths 17 and 18 used in hearing aids at low frequencies. For increasing frequencies, the total level 69 increases rapidly because the phase angle between the two signals is getting smaller and smaller, as is known, in the longer sound channel the phase delay changes faster than in the short sound channel, as can be seen from curve 69 in FIG. 14.
  • the dashed line 70 corresponding frequency exceeds the cumulative curve 69 to curve 67.
  • the frequencies f 1 and f 2 are the sum of curve higher than the curve 67.
  • both signals meeting approximately along the same phase the signal in the longer Sound channel has rotated its phase 180 more than that in the shorter channel).
  • Both signals add up to a higher overall level, maximum +6 dB.
  • the sum curve falls again above the frequency f 2 .
  • the curve 69 'dotted in FIG. 14 shows the course of the frequency response.
  • FIG. 28 shows a known receiver, in which the space located at 38 in front and the one at 39 behind membrane 37 of a receiver is connected via a pipe 55 to adjust an internal depth lowering is connected.
  • 35 represents the drive system
  • 36 the drive needle of the receiver.
  • the volume 39 forms, with an air column in the tube 55, a Helmholtz resonator with a resonance frequency f res (line 74 in FIG. 29).
  • FIG. 29 shows the frequency response that can be achieved with a receiver according to FIG. 28.
  • Line 72 shows the frequency response when the tube is closed and line 73 shows the frequency response that can be achieved with the tube 55 open.
  • the remaining measuring arrangement corresponds to that according to FIG. 3. Only the arrangement 4 is replaced by the receiver according to FIG. 28. In the case of the receiver known according to FIG. 28, however, only a fixedly set depth reduction is possible, which cannot be changed.
  • connection pieces 40 and 42 are provided on the receiver, to which the lines 17 and 18 connect. Changeable adjusting devices can then be provided in these. 25 to 27 show some of the options that can be implemented.
  • a second sound nozzle 40 is attached to the receiver 33 according to FIG. 25 in such a way that it is placed in the cavity 39 behind the membrane.
  • Another nozzle 42 leads the sound from the front of the membrane 37 out of the cavity 38. It can be seen that the acoustic signals of the two connecting pieces 40 and 42 are in phase opposition to one another for all frequencies up to the upper frequency limit of the listener.
  • Both nozzles 40 and 42 are each connected to a coupling piece 22 and 23 via a sound channel 17 and 18.
  • the channels 17 and 18 can be of different lengths, with their Lengths in the sense of the desired frequency response are to be selected.
  • the channels 17 and 18 can also contain acoustic damping elements 19 and 20, which act in the same sense as in FIG. 3 etc.
  • the damping elements 19 and 20 can also be installed at other points in the sound path, for example in the sound connectors 40 and 42 of the receiver 33.
  • the various coupling pieces 22 and 23 can be either of different length S c hal réelleen 17 and 18 are connected or glued, in another embodiment of Figure 27 to a listener with a headphone with two nozzles, which at the appropriate places only sound openings 41 and 43 corresponding to Figure 27.
  • the coupling piece becomes part of the handset itself and is given a space-saving shape.
  • the connecting channels in the coupling piece can also be integrated in this and receive a meandering course.
  • a valve-like element can be used to change the cross-section of the channels, for example a valve with a rotary plug 54 as an actuator, which allows the channel to be more or less closed.
  • the frequency response corresponding to the continuous line 75 from FIG. 30 is obtained in accordance with a position of the plug 53 transverse to the line 22 according to FIG. 17.
  • the effect of a receiver is achieved which has only one sound output, in the present case the channel 42.
  • the position of the plug 53 shown in FIG. 15 results in a lowering of the frequency response according to the dashed line 76 in FIG. 30. If the plug is installed in the sound channel between the space 38 and the addition point 52, transmission curves between the frequency responses can be made according to the lines Set 75 and 77.
  • the variation of the frequency response from curve 77 over 76 to 75 according to FIG. 30 can be achieved with a single plug 54, which can be rotated through 180 °. 18 the course of curve 76 is reached, the position of FIG. 20 the course of curve 77 and the position of FIG. 22 that of curve 75 if the channel 49 with the cavity 38 and the channel 50 is connected to the cavity 39 behind the membrane 37.
  • Possible intermediate positions of the plug 54 are drawn in FIGS. 19 and 21, one channel 49 or 50 in each case remaining open at point 51 and the other being more or less closed. This possibility is achieved by the special design of the plug 54. While in the embodiments according to FIGS.
  • the plug 53 has the shape and effect of a beer tap when used in the channel 48, the design according to FIGS with the omission of a side wall of the chick 53 by leaving behind only a part which represents a circular section in cross section, the principle of action of a three-way valve is achieved.

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  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Amplifiers (AREA)
  • Control Of Electric Motors In General (AREA)
  • Headphones And Earphones (AREA)
  • Surgical Instruments (AREA)
  • Thermistors And Varistors (AREA)
  • Power Steering Mechanism (AREA)
EP83105876A 1982-07-01 1983-06-15 Dispositif aide-ouie électrique Expired EP0098421B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105876T ATE34899T1 (de) 1982-07-01 1983-06-15 Elektrisches hoergeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3224614 1982-07-01
DE19823224614 DE3224614A1 (de) 1982-07-01 1982-07-01 Elektrisches hoergeraet

Publications (3)

Publication Number Publication Date
EP0098421A2 true EP0098421A2 (fr) 1984-01-18
EP0098421A3 EP0098421A3 (en) 1985-04-17
EP0098421B1 EP0098421B1 (fr) 1988-06-01

Family

ID=6167357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105876A Expired EP0098421B1 (fr) 1982-07-01 1983-06-15 Dispositif aide-ouie électrique

Country Status (7)

Country Link
US (1) US4629833A (fr)
EP (1) EP0098421B1 (fr)
JP (1) JPS5922500A (fr)
AT (1) ATE34899T1 (fr)
CA (1) CA1211831A (fr)
DE (3) DE3224614A1 (fr)
DK (1) DK301083A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629808A1 (fr) * 2004-08-25 2006-03-01 Phonak Ag Bouchon d'oreille et son procédé de fabrication
US7369670B2 (en) 2004-08-25 2008-05-06 Phonak Ag Earplug and method for manufacturing the same
EP1921746A1 (fr) * 2006-11-08 2008-05-14 Siemens Audiologische Technik GmbH Circuit électronique pour l'ajustage de la puissance de sortie et / ou de la réponse en fréquence d'un amplificateur pour une prothèse auditive

Families Citing this family (21)

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JPS61228846A (ja) * 1985-04-04 1986-10-13 アロカ株式会社 超音波探触子
US4852177A (en) * 1986-08-28 1989-07-25 Sensesonics, Inc. High fidelity earphone and hearing aid
FR2657716B1 (fr) * 1990-02-01 1995-07-13 Leher Francois Dispositif de transmission du son a filtrage selectif, destine a etre mis en place dans le conduit auditif externe.
GB2261343A (en) * 1991-11-08 1993-05-12 Rachael Tansey Chadwick Directional single-ear earphone, hearing aid
AT403867B (de) * 1996-10-11 1998-06-25 Resound Viennatone Hoertechnol Hörgerät
US6125172A (en) * 1997-04-18 2000-09-26 Lucent Technologies, Inc. Apparatus and method for initiating a transaction having acoustic data receiver that filters human voice
US6597793B1 (en) 1998-08-06 2003-07-22 Resistance Technology, Inc. Directional/omni-directional hearing aid microphone and housing
EP1330940B1 (fr) 2000-10-05 2012-03-07 Etymotic Research, Inc Ensemble microphone directionnel
US7317806B2 (en) * 2004-12-22 2008-01-08 Ultimate Ears, Llc Sound tube tuned multi-driver earpiece
EP1920633B1 (fr) 2005-08-23 2011-08-10 Widex A/S Prothese auditive avec bande passante acoustique accrue
US8170249B2 (en) * 2006-06-19 2012-05-01 Sonion Nederland B.V. Hearing aid having two receivers each amplifying a different frequency range
DE102006061179A1 (de) * 2006-12-22 2008-02-14 Siemens Audiologische Technik Gmbh Hörhilfe- und/oder Kommunikationsgerät mit mehreren Hörern
US7832080B2 (en) * 2007-10-11 2010-11-16 Etymotic Research, Inc. Directional microphone assembly
US8160284B2 (en) * 2008-09-09 2012-04-17 Etymotic Research, Inc. Amplification circuit and hearing aid
US8588880B2 (en) 2009-02-16 2013-11-19 Masimo Corporation Ear sensor
US20110058703A1 (en) * 2009-09-08 2011-03-10 Logitech Europe, S.A. In-Ear Monitor with Triple Sound Bore Configuration
JP5666797B2 (ja) * 2009-10-05 2015-02-12 フォスター電機株式会社 イヤホン
EP2601795B1 (fr) 2010-08-03 2019-10-09 Sonova AG Système de haut-parleur pour un appareil auditif
EP2512152B1 (fr) 2011-04-13 2013-11-06 Oticon A/s Dispositif auditif avec au moins deux microphones
IT201700046314A1 (it) * 2017-04-28 2017-07-28 Eartronik Apparecchio acustico multi-via
US11246755B2 (en) 2017-11-17 2022-02-15 Microsonic, Inc. Sound attenuation earplug system and method of manufacture

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DE1739043U (de) * 1956-09-05 1957-02-07 Wendton Werner Wendt K G Elektrisches hoergeraet.
US3772478A (en) * 1971-12-27 1973-11-13 Instrument Systems Corp Stethoscope headset
US3798390A (en) * 1972-07-24 1974-03-19 Gould Inc Hearing aid with valved dual ports
DE2303194A1 (de) * 1973-01-23 1974-07-25 Micro Technic Hueber & Co Hoerhilfsgeraet fuer schwerhoerige oder hoerbehinderte
DE2506921A1 (de) * 1974-02-20 1975-08-28 Industrial Research Prod Inc Akustisches uebertragungssystem
US3909556A (en) * 1974-08-08 1975-09-30 Audivox Inc Directionally variable hearing aid
US4109116A (en) * 1977-07-19 1978-08-22 Victoreen John A Hearing aid receiver with plural transducers
FR2490485A1 (fr) * 1980-09-22 1982-03-26 Michas Frederic Prothese auditive

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US27487A (en) * 1860-03-13 Straw-cutter
JPS57134740A (en) * 1981-02-13 1982-08-20 Toshiba Corp Keyboard input device

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Publication number Priority date Publication date Assignee Title
DE1739043U (de) * 1956-09-05 1957-02-07 Wendton Werner Wendt K G Elektrisches hoergeraet.
US3772478A (en) * 1971-12-27 1973-11-13 Instrument Systems Corp Stethoscope headset
US3798390A (en) * 1972-07-24 1974-03-19 Gould Inc Hearing aid with valved dual ports
DE2303194A1 (de) * 1973-01-23 1974-07-25 Micro Technic Hueber & Co Hoerhilfsgeraet fuer schwerhoerige oder hoerbehinderte
DE2506921A1 (de) * 1974-02-20 1975-08-28 Industrial Research Prod Inc Akustisches uebertragungssystem
US3909556A (en) * 1974-08-08 1975-09-30 Audivox Inc Directionally variable hearing aid
US4109116A (en) * 1977-07-19 1978-08-22 Victoreen John A Hearing aid receiver with plural transducers
FR2490485A1 (fr) * 1980-09-22 1982-03-26 Michas Frederic Prothese auditive

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629808A1 (fr) * 2004-08-25 2006-03-01 Phonak Ag Bouchon d'oreille et son procédé de fabrication
EP1880699A3 (fr) * 2004-08-25 2008-02-13 Phonak AG Procédé de fabrication d'un bouchon d'oreille
US7369670B2 (en) 2004-08-25 2008-05-06 Phonak Ag Earplug and method for manufacturing the same
EP1921746A1 (fr) * 2006-11-08 2008-05-14 Siemens Audiologische Technik GmbH Circuit électronique pour l'ajustage de la puissance de sortie et / ou de la réponse en fréquence d'un amplificateur pour une prothèse auditive
US8908890B2 (en) 2006-11-08 2014-12-09 Siemens Audiologische Technik Gmbh Circuit arrangement for adjusting the output power and/or the frequency response of a power amplifier for a hearing aid device

Also Published As

Publication number Publication date
JPS5922500A (ja) 1984-02-04
DK301083A (da) 1984-01-02
ATE34899T1 (de) 1988-06-15
US4629833A (en) 1986-12-16
DE3376950D1 (en) 1988-07-07
DE3224614A1 (de) 1984-01-05
CA1211831A (fr) 1986-09-23
EP0098421B1 (fr) 1988-06-01
DK301083D0 (da) 1983-06-30
EP0098421A3 (en) 1985-04-17
DE8218876U1 (de) 1985-12-05

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