EP0340594B1 - Dispositif de prothèse auditive à commande à distance sans fil - Google Patents

Dispositif de prothèse auditive à commande à distance sans fil Download PDF

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Publication number
EP0340594B1
EP0340594B1 EP89107384A EP89107384A EP0340594B1 EP 0340594 B1 EP0340594 B1 EP 0340594B1 EP 89107384 A EP89107384 A EP 89107384A EP 89107384 A EP89107384 A EP 89107384A EP 0340594 B1 EP0340594 B1 EP 0340594B1
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EP
European Patent Office
Prior art keywords
hearing aid
control
remote
signals
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.)
Expired - Lifetime
Application number
EP89107384A
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German (de)
English (en)
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EP0340594A1 (fr
Inventor
Gerhard Dr. Steeger
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.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
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Application filed by Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Priority to AT89107384T priority Critical patent/ATE91057T1/de
Publication of EP0340594A1 publication Critical patent/EP0340594A1/fr
Application granted granted Critical
Publication of EP0340594B1 publication Critical patent/EP0340594B1/fr
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Expired - Lifetime legal-status Critical Current

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    • 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
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • H04R25/606—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window
    • 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
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/558—Remote control, e.g. of amplification, frequency
    • 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
    • H04R2225/61—Aspects relating to mechanical or electronic switches or control elements, e.g. functioning
    • 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
    • H04R2225/67—Implantable hearing aids or parts thereof not covered by H04R25/606

Definitions

  • the invention relates to a hearing aid with wireless remote control according to the preamble of claim 1.
  • a hearing aid of this type is known from DE-A-1 938 381. It is known that hearing aids should be as small as possible so that they can be worn inconspicuously. This has resulted in miniature hearing aids that are worn on the head, particularly those that can be inserted into the ear canal. In this type of device too, at least the volume, but possibly also a number of other functions essential for adapting to different listening situations, should be able to be changed in operation. This requires adjustment devices that are accessible while the device is in operation in contact with the carrier. In addition, the handling area should be clear when setting. This is achieved, for example, with a hearing aid according to DE-A-1 938 381.
  • the components are distributed over two housings, one of which contains a transmitter that is wirelessly connected to the other, in which the actual hearing aid is located together with a receiver that is tuned to the transmitter.
  • the housing which contains both the hearing aid and the receiver, offers very little volume.
  • the so-called "in-the-ear devices" that are worn in the ear canal rarely have more than 100 mm3 of free space for the installation of a remote control receiver. Therefore, the aim was to get by with a receiver that does not require an additional sensor, antenna or the like.
  • the microphone of the hearing aid is also used as the receiving element for the remote control signals.
  • Inaudible sound in particular ultrasound, is used to transmit the remote control signals.
  • the ultrasound transmitter is located in a control unit in which the control signals are generated via a keyboard and emitted via a loudspeaker, and in the hearing aid the derivation of the signals picked up by the microphone is split into two branches, one of which is inserted into the hearing aid and the other a filter blocking all signals except the ultrasound signals leads to the control part of the hearing aid.
  • a hearing aid apparatus is known from FR-A-1 113 759, which is essentially formed from two modules for speech sound transmission by means of structure-borne sound.
  • a first module can conduct sound with the head of the hearing impaired, e.g. in its mouth with a tooth.
  • the second module which picks up the speech sound via a microphone, is via a transmitter to a bone, e.g. the hip or arm, the hearing impaired.
  • ultrasound is used as the auxiliary frequency, on which the speech sound signals are modulated.
  • a hearing aid is largely freed from the ballast of actuators and switches.
  • the following functions essentially take place in the remote control: After pressing an operating button, the transmitter electronics recognizes this process and the control signal is coded and transmitted according to the desired function. The inverse process takes place in the receiver. The signal is received, decoded, recognized and the electronic control element is actuated.
  • electromagnetic transmission, infrared transmission and the ultrasound transmission described above have already been proposed (DE-C-2 407 726).
  • each of the transmission paths can be influenced by specific sources of interference.
  • electromagnetic transmission a large number of electromagnetic interference sources must be taken into account.
  • free choice of transmission frequencies is very limited due to country-specific postal regulations and varies greatly from country to country.
  • infrared transmission direct sunlight on the receiver diode can cause problems and the receiver diode must be attached to an exposed location on the hearing aid.
  • the ultrasonic path can be replaced by sound sources, e.g. an ultrasonic cleaning bath. Additional components are required to receive the control signals for electromagnetic transmission and infrared transmission, while the existing microphone can be used for ultrasound transmission.
  • the invention is based on the object of providing a hearing aid (in particular in-the-ear hearing aids, implanted hearing aids) create magnetic or mechanical excitation of the middle ear) with wireless remote control, which is improved with respect to the transmission of the remote control signals and enables a more inconspicuous use of the remote control.
  • a hearing aid in particular in-the-ear hearing aids, implanted hearing aids
  • wireless remote control which is improved with respect to the transmission of the remote control signals and enables a more inconspicuous use of the remote control.
  • sound outside the hearing range
  • remote control signals are transmitted to the skeleton, in particular the cranial bone of the hearing aid wearer, by bone sound excitation and not, as in the known designs, to the outer ear by airborne sound transmission.
  • a suitable design of the remote control transmitter ensures that the remote control is possible completely inconspicuously, namely by the hearing aid wearer holding the small control device in his hand and executing movements for transcutaneous contact of the control device contact area with his bone structure.
  • the hearing aid according to the invention works in the remote control part with structure-borne sound waves, in particular in the ultrasound or in the low-frequency range outside the hearing range, which are emitted by the vibrator of the remote control device in such a way that when the control device is placed on the scalp, for example, above the rock or temporal bone stimulate the skull bone to vibrate. These vibrations are transmitted to the hearing aid inserted in the ear canal and to a sound transducer present in the hearing aid, which converts them into an electrical signal. The decoding of this signal gives the control signal for setting the hearing aid functions.
  • the control device 1 provided for remote control of the hearing aids shown in FIGS. 3 to 5 is a handy, small, battery-operated device in the embodiment according to FIGS. 1 and 2, the housing of which can be designed ergonomically.
  • the control unit has, for example, an operating panel 2 with sensor buttons 3.
  • the control unit contains a coding circuit 4, which generates a serial sequence of data and test bits in accordance with the programming or control command effected by touching the sensor buttons 3 and which repeatedly transmits to a modulator 6 at the transmission clock frequency determined by the frequency of a clock generator 5 until a timing circuit also fed by the clock generator 5 ends the transmission and switches the control unit back to the ready state.
  • the serial information received from the coding circuit 4 of the oscillation generated in a generator 7 is modulated and shifted into a carrier frequency range which can be transmitted inaudibly or at least not disturbingly acoustically to the human skeleton. An audible airborne sound emission into the room is excluded in any case.
  • the modulator 6 is a power amplifier 8, which raises the output signal to a power level that is sufficient for reprogramming the hearing aid, and a vibrator 9 with a contact surface 10, which is used for transcutaneous coupling of the programming or control signal emanating from the vibrator to the bony skeleton of the hearing aid wearer.
  • the selection of the operating function by means of the sensor buttons 3 can take place before the control device 1 is placed on the skin in order to carry out the remote control as inconspicuously as possible. While switching to the body surface, the actuation of switching elements is not absolutely necessary, but is still possible.
  • a simple variant consists in letting the transmitter work for a fixed time (e.g. 5 seconds) after removing the fingers from the control element or the sensor keys and then switching it off.
  • control device 1 remains active as long as the contact surface 10 of the vibrator 9 is in contact with the skin.
  • control device can be switched on and off by sensor strips on the contact surface 10 or by movable mounting of the vibrator 9 in connection with a microswitch.
  • This form of sequence control also minimizes the energy consumption of the control unit.
  • FIG. 2 shows an embodiment of the housing design of the control device 1 as a flat control device which is adapted to the shape of the hollow hand and has a non-slip coating on the back (facing the hand).
  • the control device hidden in the slightly curved hand, can be guided inconspicuously, for example, to the head.
  • the grip and operation of the control device with one hand favors a recessed grip 11.
  • a switch 12 that can be actuated by a wheel can be used, for example serve, which is indicated in Figure 2 under the thumb on the control device and strengthens the function (eg volume) when moving in the direction of the thumb tip, decreases the function when moving in the direction of the thumb root.
  • This switch 12 or its actuating wheel preferably assumes a neutral central position when the load is released. If this switch 12 is not required for a simple switchover function (eg microphone off, hearing coil for telephone operation on), it remains inoperative.
  • an in-the-ear hearing aid is used which has a housing shell 26 which is adapted to the ear canal and in which a microphone 27 for converting the speech sound signals into electrical signals is arranged such that the microphone 27 is decoupled from the housing 26 in relation to structure-borne sound excitation .
  • a second sound transducer 28 is provided in the housing 26 of the in-the-ear hearing device, but in such a way that the sound transducer 28 is coupled to the housing shell for the purpose of structure-borne sound excitation and can receive the signals transmitted by structure-borne sound for controlling and programming the hearing aid device and convert them into electrical control commands .
  • the receiver 29 of the hearing aid device is designated by 29, which receives the electrical signals emitted by the microphone 27 and amplified and reshaped in an amplifier circuit 30 (for example filtered and / or reduced in dynamics), converts them into sound vibrations and emits them in the direction of the eardrum 15.
  • Contact springs 32 are provided for contacting a circuit board of the amplifier circuit 30 with a battery 31.
  • the sound transducer 28 built into the hearing aid can be a microphone specially developed for the transmission frequencies and mechanically well coupled to the housing wall of the hearing aid, which microphone is present in addition to the normal microphone 27 that receives the speech signals.
  • the sound transducer provided for the speech signals is used, i.e. the microphone 33, at the same time as a sound transducer for the structure-borne sound signals for remote control of the hearing aid.
  • the remote control signals are separated from the speech signals by a frequency-selective circuit known per se, e.g. using high and low pass filters.
  • the sound transducer 33 is mounted in a plastic pocket 34, which causes a high attenuation in the listening area, but as low as possible at the carrier frequencies of the remote control signals.
  • the sound transducer 33 is supported by the plastic part 34 on the housing shell 26 and at the same time embedded in plastic.
  • the hearing aid In this hearing aid with a magnetically excitable middle ear implant formed by a permanent magnet 36, the hearing aid itself can be removed from the auditory canal 14 without any intervention.
  • an excitation coil 35 is arranged in the housing shell 26 of the hearing aid device and is connected to the amplifier circuit 30.
  • the excitation coil 35 is fed with the amplified electrical output signal of the circuit 30 and this signal is transmitted in the form of an alternating magnetic field to the small permanent magnet 36 attached to the stirrup 18.
  • the permanent magnet set in vibration transmits the speech sound signals to the inner ear.
  • the middle ear is opened and the anvil of the ear removed.
  • the fully implantable hearing aid according to FIG. 5 consists of a liquid-tight and gas-tight housing 40 of an amplifier part 41 made of tissue-compatible material, which is used for fixation, but especially for structure-borne sound transmission by means of a screw 50 or the like. is attached to the skull 42. Furthermore, a microphone 43 is implanted in the area of the auditory canal 14, which is the through the ear canal guided speech sound signals and in the form of electrical signals via an electrical line 44 to the input of the amplifier part 41.
  • a piezoelectric vibrator 45 is attached to the skull bone in such a way that the free end 46 of the vibrator 45 causes the stirrup 18 to vibrate as soon as it deforms under the influence of the electrical alternating voltage transmitted from the output of the amplifier part 41 via an electrical line 47.
  • the anvil and hammer are removed for the implantation of the vibrator 45.
  • the circuit board with integrated and discrete components of the amplifier part 41 is supplied from a connected battery 49.
  • the amplifier part 41 containing the battery 49 can also be fully implanted because of the low power consumption.
  • the amplifier part 41 is screwed to the cranial bone 42 and a structure-borne sound microphone 48 (structure-borne sound vibration sensor) is brought into mechanical contact, for example via a connecting web 51, with the screw 50.
  • a structure-borne sound microphone 48 structure-borne sound vibration sensor
  • the screw connection of the vibrator 45 can serve as a contact point for the structure-borne sound transmission, the structure-borne sound vibrations then either mechanically via a stiff wire, Connecting bridge or the like (between the screw connection of the vibrator 45 and the structure-borne sound microphone 48 of the amplifier part) or electrically, by screwing a microphone onto the screw connection of the vibrator 45.

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  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Neurosurgery (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Transmitters (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Prostheses (AREA)

Claims (15)

  1. Appareil de correction auditive avec télécommande sans fil d'au moins de parties de ses fonctions commandables, dans lequel aussi bien des éléments de correction auditive que des éléments servant à commander les fonctions de l'appareil et un récepteur pour des signaux de télécommande pour la commande de ces fonctions sont logés dans un boîtier que l'on peut porter sur la tête, et dans lequel le récepteur des signaux de télécommande possède un transducteur acoustique, qui est raccordé, par l'intermédiaire d'un amplificateur ainsi que par l'intermédiaire d'une unité de décodage et d'identification, à au moins un organe de commande de l'appareil de correction auditive, et dans lequel les signaux de télécommande sont délivrés avec une fréquence de télécommande à l'extérieur de la gamme de perception auditive de l'homme, par un appareil de commande (1) destiné à être tenu dans la main et qui comporte notamment un tableau de commande (2), une unité d'identification et de codage ainsi qu'un émetteur, caractérisé par le fait que dans l'appareil de commande (1) il est prévu comme émetteur un vibrateur (9) qui envoie les signaux de télécommande, par l'intermédiaire d'une excitation du son transmis par le corps, au squelette du porteur de l'appareil de correction auditive, que les signaux de télécommande de l'émetteur peuvent être transmis au récepteur en tant que signaux acoustiques transmis par le corps, par l'intermédiaire d'un couplage transcutané d'une surface de contact (10) de l'appareil de commande (1), et que le transducteur acoustique du récepteur pour les signaux de télécommande est un transducteur acoustique (28;33;48), qui convertit les signaux acoustiques transmis par le corps en des signaux électriques.
  2. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait qu'il est prévu comme transducteur acoustique (28;33;48) pour la réception et la conversion des signaux de télécommande du son transmis par le corps, un microphone (33) pour des signaux vocaux de l'appareil de correction auditive, le microphone (33) étant disposé dans une coque (26) du boîtier, qui peut être insérée dans le conduit auditif (14), de telle sorte que le microphone (33) est protégé par rapport à la coque (26) du boîtier par une pièce moulée en matière plastique (34), qui a un effet d'affaiblissement sur des couplages acoustiques parasites dans la gamme des fréquences audibles, mais forme un pont pour les signaux de télécommande sous la forme de sons transmis par le corps, en direction du microphone et qu'en aval du microphone (33) est branché un circuit sélectif en fréquence servant à séparer les signaux de télécommande sous la forme de sons transmis par le corps, par rapport aux signaux vocaux.
  3. Appareil de correction auditive suivant les revendications 1 et 2, caractérisé par le fait que les signaux de télécommande formés par des sons transmis par le corps sont envoyés en tant que signaux électriques de télécommande, par l'intermédiaire du circuit sélectif en fréquence, aux organes de commande raccordés pour l'exécution des instructions de commande, et que les signaux vocaux électriques sont introduits par l'intermédiaire du circuit sélectif en fréquence dans une bobine d'excitation (35), qui est également disposée dans la coque (26) du boîtier, et que la bobine d'excitation (35) transmet les signaux vocaux sous la forme d'un champ magnétique alternatif à un aimant permanent (36), qui peut être fixé sur l'étrier (18) de l'oreille et qui est mis en mouvement par le champ magnétique de la bobine d'excitation et transmet de ce fait les signaux vocaux à l'oreille interne.
  4. Appareil de correction auditive suivant la revendications 2, caractérisé par le fait que le microphone (33) est enrobé dans une matière plastique, notamment une matière plastique à l'état de mousse, et que ce revêtement en matière plastique (34) s'applique à plat contre la coque (26) du boîtier.
  5. Appareil de correction auditive suivant la revendication 2, caractérisé par le fait que le microphone (33) est installé dans une poche en matière plastique (34) ou analogue, qui possède, dans la gamme audible, une caractéristique d'affaiblissement élevée et, dans la gamme de la fréquence de commande, une caractéristique de faible affaiblissement.
  6. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait que pour la réception et la transduction des signaux de télécommande formés de sons transmis par le corps, il est prévu, dans une coque (26) du boîtier, un dispositif pouvant être placé dans le conduit auditif (14) et qui comporte, en dehors d'un microphone (27) servant de transducteur acoustique pour les signaux vocaux, un autre transducteur acoustique (28) accordé sur la fréquence de télécommande de l'appareil de commande (1), le microphone (27) étant affaibli par les signaux vocaux et découplé par rapport à la coque (26) du boîtier et le transducteur acoustique (28) étant couplé à la coque (26) du boîtier pour les signaux de télécommande formés de sons transmis par le corps.
  7. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait qu'un boîtier (40) étanche aux liquides et aux gaz peut être fixé, d'une manière totalement implantée, au moyen d'une partie formant amplificateur (41) sur un os (42) du crâne, qu'il est prévu un microphone (43) qui reçoit les signaux vocaux envoyés par le conduit auditif (14) et est raccordé électriquement par un conducteur (44) à la partie formant amplificateur (41), qu'un autre vibrateur piézoélectrique (45) peut être fixé à l'os du crâne et excite, par son extrémité libre (46), l'étrier (18) de l'oreille lorsqu'une tension électrique provenant de la partie formant amplificateur (41) et envoyée au moyen d'un conducteur électrique (47), est appliquée à partir d'un signal vocal, que dans le boîtier (40) de la partie formant amplificateur (41), il est prévu un circuit sélectif en fréquence pour séparer les signaux de télécommande constitués de sons transmis par le corps, par rapport aux signaux vocaux, sous la forme d'une platine porte-circuits comportant des composants électroniques intégrés et discrets ou analogues, ainsi qu'un microphone (48) pour le son transmis par le corps, qui est accouplé à la paroi du boîtier (40) et sert à convertir les signaux de télécommande formés de sons transmis par le corps, en des signaux électriques de commande.
  8. Appareil de correction auditive suivant la revendication 7, caractérisé par le fait que le boîtier (40) de la partie formant amplificateur (41) peut être fixé par une vis (50), une tige ou analogue sur l'os (42) du crâne, et que le microphone (48) recevant le son transmis par le corps est raccordé mécaniquement à l'élément de fixation (50).
  9. Appareil de correction auditive suivant la revendication 7, caractérisé par le fait que le microphone (48) transmettant le son transmis par le corps est installé au point de fixation de l'autre vibrateur piézoélectrique (45) et est raccordé à la partie formant amplificateur par l'intermédiaire d'une ligne électrique.
  10. Appareil de correction auditive suivant la revendication 7, caractérisé par le fait que pour la transmission des signaux de télécommande constitués par des sons transmis par le corps, le microphone (48) de transmission des sons transmis par le corps est accouplé au moyen d'une liaison mécanique, d'un fil, d'une barrette ou analogue, au point de fixation de l'autre vibrateur piézoélectrique (45).
  11. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait que l'appareil de commande (1) possède un boîtier adapté à la forme de la main creuse, et plat ailleurs.
  12. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait que le boîtier de l'appareil de commande (1) possède, sur la face arrière tournée à l'opposé du tableau de commande (2), un revêtement antidérapant, une surface antidérapante ou analogue.
  13. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait que le boîtier de l'appareil de commande (1) possède la surface de contact (10) de l'appareil de commande (1), qui doit être appliquée sur la peau au-dessus d'un os proche de la surface.
  14. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait que l'appareil de commande (1) peut être activé et/ou arrêté à l'aide de touches (3) du panneau de commande (2), à l'aide de capteurs situés sur la surface de contact (10) de l'appareil de commande (1), à l'aide d'un support mobile de la surface de contact (10) ou analogue.
  15. Appareil de correction auditive suivant la revendication 1, caractérisé par le fait que dans l'appareil de commande (1) il est prévu un circuit de codage (4), qui, conformément à l'instruction de programmation déclenchée par le tableau de commande (2), produit une suite de bits de données de contrôle en série et émet d'une manière répétée en permanence cette suite, à la fréquence de télécommande déterminée par la fréquence d'un générateur de cadence (5), en direction d'un modulateur (6) jusqu'à ce qu'un circuit de temporisation, alimenté également par le générateur de cadence, arrête la transmission et ramène l'appareil de commande (1) dans un état prêt à fonctionner.
EP89107384A 1988-05-06 1989-04-24 Dispositif de prothèse auditive à commande à distance sans fil Expired - Lifetime EP0340594B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107384T ATE91057T1 (de) 1988-05-06 1989-04-24 Hoerhilfegeraet mit drahtloser fernsteuerung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3815598 1988-05-06
DE3815598 1988-05-06

Publications (2)

Publication Number Publication Date
EP0340594A1 EP0340594A1 (fr) 1989-11-08
EP0340594B1 true EP0340594B1 (fr) 1993-06-23

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Family Applications (1)

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EP89107384A Expired - Lifetime EP0340594B1 (fr) 1988-05-06 1989-04-24 Dispositif de prothèse auditive à commande à distance sans fil

Country Status (5)

Country Link
US (1) US5012520A (fr)
EP (1) EP0340594B1 (fr)
JP (1) JPH01318500A (fr)
AT (1) ATE91057T1 (fr)
DE (2) DE8816422U1 (fr)

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US5012520A (en) 1991-04-30
EP0340594A1 (fr) 1989-11-08
DE8816422U1 (fr) 1989-08-10
DE58904772D1 (de) 1993-07-29
JPH01318500A (ja) 1989-12-22
ATE91057T1 (de) 1993-07-15

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