EP0448764A1 - Prothèse auditive électrique programmable - Google Patents

Prothèse auditive électrique programmable Download PDF

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Publication number
EP0448764A1
EP0448764A1 EP90106192A EP90106192A EP0448764A1 EP 0448764 A1 EP0448764 A1 EP 0448764A1 EP 90106192 A EP90106192 A EP 90106192A EP 90106192 A EP90106192 A EP 90106192A EP 0448764 A1 EP0448764 A1 EP 0448764A1
Authority
EP
European Patent Office
Prior art keywords
hearing aid
transmitter
coil
receiver
external control
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
EP90106192A
Other languages
German (de)
English (en)
Other versions
EP0448764B1 (fr
Inventor
Herbert Dipl.-Ing. Wolf
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 AG
Siemens Audioligische Technik GmbH
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
Application filed by Siemens AG, Siemens Audioligische Technik GmbH filed Critical Siemens AG
Priority to DE59005947T priority Critical patent/DE59005947D1/de
Priority to EP90106192A priority patent/EP0448764B1/fr
Priority to DK90106192.9T priority patent/DK0448764T3/da
Priority to AT90106192T priority patent/ATE106651T1/de
Publication of EP0448764A1 publication Critical patent/EP0448764A1/fr
Application granted granted Critical
Publication of EP0448764B1 publication Critical patent/EP0448764B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention relates to a programmable electrical hearing aid, with microphone, earpiece, amplifier and transmission part adjustable to different transmission characteristics, a control unit with receiver and memory and an external control device with memory, transmitter and programming device.
  • a hearing aid of this type is known for example from DE-C-36 42 828.
  • the hearing aid adapted to the individual hearing damage of the hearing impaired by the hearing care professional known hearing aid can also be adapted by the hearing impaired to certain transfer functions.
  • the user of the hearing aid by means of an external control device and by remote control the ability to his hearing aid specific environmental situations, for example, if the user from a quiet environment in a noisy environment or vice versa, adapt.
  • parameters for, for example, four different environmental situations are stored in the external control unit and the user can select the program that seems most favorable to the respective environment by operating program keys on the control unit.
  • the parameters corresponding to this program and stored in the control unit are then transmitted to the hearing aid via remote control.
  • modulation and demodulation of the control signals from the transmitter of the control unit to the receiver of the hearing aid and by means of a control unit and an audio processor in the hearing aid, the transmission characteristic of the hearing aid, to adapt to the changed environmental situation, changeable.
  • the initial adaptation of the hearing aid to the hearing loss of the hearing impaired or adaptation to a changing hearing loss are possible with the known remote controllable, programmable hearing aid only with great effort, as between the determination of the measures for hearing damage and the vote and adaptation to be stored in corresponding memory locations Parameters for the transmission characteristics no direct coupling with the thereby to be arranged on the ear of the hearing impaired hearing aid.
  • the known, contactless and e.g. By electromagnetic transmission programmable hearing aid only a data transfer from the programming device of the external control device to the hearing aid is possible. As a result, neither an identification of the hearing aid nor an immediate control of the transmitted data and control signals is possible.
  • a hearing aid is also known in which the analog, coming from the microphone sound signal after passing through a filter in an A / D converter converted into a digital signal and fed to a discrete signal processing circuit whose transfer function in an electrically programmable read-only memory (EPROM) stored parameters by means of a processor for adaptation to the hearing damage is controllable.
  • the parameters of the computer program are read in via a memory multiplexer, the parameters of the computer program being the measured variables of an audiometrically determined audiogram. It transfers the audiogram directly from the audiometer via the memory multiplexer to the memory of the computer.
  • For parameter transmission is a line connection to the hearing aid and the hearing aid is a line connection required.
  • the electroacoustic properties of a hearing aid are determined by the characteristics of the transducers (microphone, earphones), their sound channels and by the signal processing (amplifiers, filters) certainly.
  • the signal processing is influenced in a suitable manner by adjusting and storage elements. For this purpose, it is necessary that all information about the hearing aid (manufacturer-electro-acoustic properties, device type, etc.) are correct and reliable.
  • the aim of the invention is therefore to propose a hearing aid of the type mentioned, which is programmable without supply and line connection and in which an interference-proof and secure transmission between a programming unit and the hearing aid without galvanic coupling is possible.
  • Another object of the invention is a sturdy, secure and contactless transmission of identification codes, address codes, command codes, data words and codes for data backup to the hearing aid and the hearing aid back.
  • this is achieved in a hearing aid of the type mentioned above in that the receiver of the hearing aid and the transmitter of the external control device for wireless, bidirectional exchange of control signals by means of a transmission direction determining control logic to receiver and transmitter parts are formed.
  • the receiver of the hearing aid and the transmitter of the external control device can be switched by switch actuated by the control logic on the transmitter or receiver.
  • the hearing device and the external control device as a receiver and transmitter part or transmitter and receiver part for transmitting the control signals depending on a coil arranged for transmitting the control signals in spatial allocation of the control device to the hearing aid, but at a distance are.
  • bidirectional data transmission from and to the hearing device is advantageously achieved by arranging a suitable coil pair close to each other in a spatially close and facing position (maximum flow).
  • the coil of the external control device is galvanically connected to a programming device or a programming device or to a computer (PC) containing the program.
  • This coil can be switched both as a transmitting coil and as a receiving coil.
  • the second coil is integrated in the hearing aid and can also be switched as a transmitting or receiving coil.
  • the coil of the external control device is mounted close to the head and in the region of the hearing aid of the hearing impaired, so that the acoustics is influenced as little as possible.
  • the transmitter and receiver part (the coil) of the external control device can be fastened to a bracket arranged on the head of the hearing aid wearer, whereby an assignment to the transmitter and receiver part (the coil) of the hearing aid worn on or in the ear is provided by far.
  • the transmitter and receiver part i. the coil, the external control unit, the ear provided with the hearing aid as a loop, in particular induction loop, engage around and held by the ear, with distance to the transmitter and receiver part of the hearing aid.
  • the purely physical transmission of the control signals takes place in particular via the magnetic component of the electromagnetic coil field.
  • the spatial proximity of the coils of the external control device or the hearing aid is of particular advantage during the programming process.
  • the coil of the hearing aid with a downstream amplifier can be made insensitive as a receiving coil. This results in increased safety against sources of interference and a space-saving arrangement in the hearing aid.
  • the sensitivity of the coil of the control unit can be selected as a receiver coil so that with reasonable noise immunity, the power consumption of the coil of the hearing aid as a transmitting coil is low and within the meaningful for hearing aids energy consumption.
  • Non-volatile, digital memory or non-volatile ROM For the permanent programming of EEPROMs as storage medium (non-volatile, digital memory or non-volatile ROM) voltages up to 15 V are required.
  • the voltage required for programming Up can be obtained by voltage multiplication of U B.
  • this requires special integrated circuits with corresponding space requirements in the hearing aid.
  • the voltage required for programming an electrically erasable and programmable read-only memory (EEPROM) of the hearing aid Up is generated in the coil of the hearing aid, wherein after the transmission of the control signals from the coil of the external control device to Spool of the hearing aid, the magnetic field of the coil of the hearing aid is increased such that after rectification and smoothing the voltage Up is obtained.
  • EEPROM electrically erasable and programmable read-only memory
  • the external control device is summarized in block 1 substantially.
  • This external, the programming of the actual electric hearing aid (block 2) serving control unit 1 comprises a programming device 3 with a control panel or control panel 4 and with a memory 5 and further a microcontroller.
  • the programming device 3 can be connected by an interface 6 to a control part 7.
  • This control part contains a transmitter and receiver part 8, which can be switched by a control logic 9 accordingly.
  • the drawn in the block diagram, programmable electrical hearing aid 2 contains substantially between a microphone 10 and a handset 11 an amplifier and transmission part 12 (eg with preamplifier, low, high and / or band-pass filters (frequency selective Circuit), with volume control circuit, rectifier, modulator, power amplifier, etc.).
  • a control part 13 is connected, which includes a memory (in particular EEPROM - electrically erasable and programmable read-only memory) and serves to introduce the parameters of a specific transmission characteristic in the amplifier and transmission part 12 of the hearing aid.
  • the hearing aid 2 includes a receiver and transmitter part 14, which is switchable by a control logic 15 to receive or broadcast.
  • the hearing aid 2 further includes a battery 16 or a battery.
  • a coil 17 and the transmitter and receiver part 8 of the external control unit 1 also has a coil 18.
  • 19, 2O and with 21, 22 amplifiers for the transmit or receive signal of the transmitter and receiver part 8 and the receiver and transmitter part 14 are designated.
  • the respective transmitter or receiver members are activated by switches 23 and 24 of the control logic 9 and the control logic 15.
  • the external control unit 1 from a programming device or personal computer PC combined or wired to the control part (interface) consist, wherein the coil 18, an electrical line connection 25 leads.
  • the line connection 25 terminates in the coil 18 of the external control device, which is e.g. is designed as an induction loop and is applied to the programming of the hearing aid 2 to the ear 26 of the hearing aid wearer.
  • the hearing aid 2 is arranged in the ear canal of the ear 26 - as in the example shown - or as a BTE device behind the pinna.
  • the coil 17 of the ITE device is indicated in the drawing to show that the coils 18, 17, although spaced from each other, but are facing so that the hearing aid is contactless programmable by electromagnetic signal transmission.
  • the coil 18 encloses the ear 26 annular and is held by the ear. By spatially-close arrangement of the coils 17, 18 and as possible unhindered assignment of the coils a maximum, energy-saving signal transmission is possible.
  • the coil 17 is seated in the hearing aid, during the programming process, the coil 18 is galvanically connected to the external control device 1, e.g. a programming device as described in EP-A-0 363 609, or e.g. connected to a data processing device (computer, personal computer PC).
  • the coil 18 of the external control device 1 is in turn connected to this by the line 25.
  • a bracket 28, 29 To hold the coil 18 on the head 27 of the hearing aid wearer is a bracket 28, 29.
  • the not shown hearing aid can be located behind the ear 26 or in the ear of the hearing impaired.
  • the arrangement of Figure 3 shows, by means of the retaining bracket 28, 29 is a good assignment of the coil 18 of the external Control device to the coil of the hearing aid possible.
  • the invention results in a bidirectional, interference-proof and secure transmission path between the hearing aid 2 and the external control unit (programming unit) without galvanic coupling. Corresponding line connections on the hearing aid itself and manufacturer-specific plug connections or connecting lines can therefore be omitted according to the invention.
  • the voltage U P required for the permanent programming of the electrically erasable and programmable read-only memory (EEPROM) contained in the control part 13 of the hearing aid can be generated from the voltage U B of the hearing aid battery 16 by means of the coil 17 of the hearing aid.
  • the required voltage U P for programming the read-only memory (EEPROM) of the control section 13 of the hearing aid by means of the coil 17 of the hearing aid after completion of the actual signal transmission through the coil 18 of the control unit the flux change d0 ⁇ / dt increased by the coil 17 so that After rectification and smoothing a sufficiently high voltage U P is formed.
  • the transmission of the signals between the coils 17, 18 preferably takes place via the magnetic component of the electromagnetic field generated in the coils.
  • capacitive couplings are possible.
  • FM frequency modulation
  • PDM pulse width modulation
  • PCM pulse code modulation, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Transmitters (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP90106192A 1990-03-30 1990-03-30 Prothèse auditive électrique programmable Expired - Lifetime EP0448764B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59005947T DE59005947D1 (de) 1990-03-30 1990-03-30 Programmierbares elektrisches Hörgerät.
EP90106192A EP0448764B1 (fr) 1990-03-30 1990-03-30 Prothèse auditive électrique programmable
DK90106192.9T DK0448764T3 (da) 1990-03-30 1990-03-30 Programmerbart elektrisk høreapparat
AT90106192T ATE106651T1 (de) 1990-03-30 1990-03-30 Programmierbares elektrisches hörgerät.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90106192A EP0448764B1 (fr) 1990-03-30 1990-03-30 Prothèse auditive électrique programmable

Publications (2)

Publication Number Publication Date
EP0448764A1 true EP0448764A1 (fr) 1991-10-02
EP0448764B1 EP0448764B1 (fr) 1994-06-01

Family

ID=8203841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106192A Expired - Lifetime EP0448764B1 (fr) 1990-03-30 1990-03-30 Prothèse auditive électrique programmable

Country Status (4)

Country Link
EP (1) EP0448764B1 (fr)
AT (1) ATE106651T1 (fr)
DE (1) DE59005947D1 (fr)
DK (1) DK0448764T3 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022276A1 (fr) * 1993-03-15 1994-09-29 Tøpholm & Westermann APS Systeme d'appareil auditif telecommande et, plus particulierement, teleprogrammable
WO1996007295A1 (fr) * 1994-08-31 1996-03-07 Argosy Electronics Inc. Appareil et procede pour la commande magnetique d'une prothese auditive
EP0823829A2 (fr) * 1996-08-07 1998-02-11 Beltone Electronics Corporation Système digital de prothèse auditive
EP0828404A2 (fr) * 1996-09-06 1998-03-11 Türk + Türk Electronic GmbH Prothèse auditive et dispositif de commande pour la programmation de la prothèse
DE19639236A1 (de) * 1996-09-24 1998-03-26 Geers Hoergeraete Verfahren zur direkten Einstellung von programmierbaren Hörgeräten über eine definierte Datenschnittstelle
WO1998016086A1 (fr) * 1996-10-10 1998-04-16 Alexandrescu Eugene Instrument auditif programmable ameliore et son procede de programmation
DE19819509A1 (de) * 1996-12-09 1999-11-11 Siemens Audiologische Technik Serielles bidirektionales Datenübermittlungsverfahren für Hörgeräte mittels Signalen verschiedener Impulsbreite
US6351472B1 (en) 1998-04-30 2002-02-26 Siemens Audiologische Technik Gmbh Serial bidirectional data transmission method for hearing devices by means of signals of different pulsewidths
EP1246504A2 (fr) * 2001-03-30 2002-10-02 Siemens Audiologische Technik GmbH Système de prothèse auditive avec une prothèse auditive programmable et une unité de transmission et/ou de réception, unité de transmission et/ou de réception ainsi que une prothèse auditive programmable
EP1250026A1 (fr) * 2001-04-11 2002-10-16 Phonic Ear, Inc. Transfer de données courte portée pour dispositifs de communication
EP2007024A2 (fr) * 2007-06-20 2008-12-24 Siemens Audiologische Technik GmbH Ensemble de dispositifs comprenant au moins un émetteur et procédé pour améliorer l'intensité de champ de réception
WO2009112898A2 (fr) 2008-03-13 2009-09-17 Sony Ericsson Mobile Communications Ab Antenne destinée à être utilisée dans un écouteur et écouteur à antenne intégrée
US7787647B2 (en) 1997-01-13 2010-08-31 Micro Ear Technology, Inc. Portable system for programming hearing aids
US8300862B2 (en) 2006-09-18 2012-10-30 Starkey Kaboratories, Inc Wireless interface for programming hearing assistance devices
US9344817B2 (en) 2000-01-20 2016-05-17 Starkey Laboratories, Inc. Hearing aid systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541648C2 (de) * 1995-11-08 2000-10-05 Siemens Audiologische Technik Einrichtung zur Übertragung von Programmierdaten an Hörhilfegeräte
DE10236469B3 (de) * 2002-08-08 2004-02-12 Siemens Audiologische Technik Gmbh Drahtlos programmierbares Hörhilfsgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074817A (en) * 1980-04-24 1981-11-04 Gen Eng Inc A two-way communication device
EP0263294A2 (fr) * 1986-10-03 1988-04-13 SONAR Design & Hörtechnik GmbH Circuit de charge sans fil pour appareil auditif
CH670349A5 (en) * 1986-08-12 1989-05-31 Phonak Ag Hearing aid with wireless remote vol. control - incorporates pick=up coil for HF remote control signal addressed to amplifier gain adjustment circuit
EP0335542A2 (fr) * 1988-03-30 1989-10-04 3M Hearing Health Aktiebolag Prothèse auditive avec capacité de saisie de données
EP0341995A2 (fr) * 1988-05-10 1989-11-15 Minnesota Mining And Manufacturing Company Dispositif de calibrage et prothèse auditive comportant des informations de calibrage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074817A (en) * 1980-04-24 1981-11-04 Gen Eng Inc A two-way communication device
CH670349A5 (en) * 1986-08-12 1989-05-31 Phonak Ag Hearing aid with wireless remote vol. control - incorporates pick=up coil for HF remote control signal addressed to amplifier gain adjustment circuit
EP0263294A2 (fr) * 1986-10-03 1988-04-13 SONAR Design & Hörtechnik GmbH Circuit de charge sans fil pour appareil auditif
EP0335542A2 (fr) * 1988-03-30 1989-10-04 3M Hearing Health Aktiebolag Prothèse auditive avec capacité de saisie de données
EP0341995A2 (fr) * 1988-05-10 1989-11-15 Minnesota Mining And Manufacturing Company Dispositif de calibrage et prothèse auditive comportant des informations de calibrage

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU676538B2 (en) * 1993-03-15 1997-03-13 Widex A/S Remotely controlled, especially remotely programmable hearing aid system
US5710819A (en) * 1993-03-15 1998-01-20 T.o slashed.pholm & Westermann APS Remotely controlled, especially remotely programmable hearing aid system
WO1994022276A1 (fr) * 1993-03-15 1994-09-29 Tøpholm & Westermann APS Systeme d'appareil auditif telecommande et, plus particulierement, teleprogrammable
WO1996007295A1 (fr) * 1994-08-31 1996-03-07 Argosy Electronics Inc. Appareil et procede pour la commande magnetique d'une prothese auditive
EP0823829A3 (fr) * 1996-08-07 2000-01-26 Beltone Electronics Corporation Système digital de prothèse auditive
EP0823829A2 (fr) * 1996-08-07 1998-02-11 Beltone Electronics Corporation Système digital de prothèse auditive
EP0828404A2 (fr) * 1996-09-06 1998-03-11 Türk + Türk Electronic GmbH Prothèse auditive et dispositif de commande pour la programmation de la prothèse
EP0828404A3 (fr) * 1996-09-06 2003-05-14 Türk + Türk Electronic GmbH Prothèse auditive et dispositif de commande pour la programmation de la prothèse
DE19639236A1 (de) * 1996-09-24 1998-03-26 Geers Hoergeraete Verfahren zur direkten Einstellung von programmierbaren Hörgeräten über eine definierte Datenschnittstelle
US5909497A (en) * 1996-10-10 1999-06-01 Alexandrescu; Eugene Programmable hearing aid instrument and programming method thereof
WO1998016086A1 (fr) * 1996-10-10 1998-04-16 Alexandrescu Eugene Instrument auditif programmable ameliore et son procede de programmation
DE19819509A1 (de) * 1996-12-09 1999-11-11 Siemens Audiologische Technik Serielles bidirektionales Datenübermittlungsverfahren für Hörgeräte mittels Signalen verschiedener Impulsbreite
US7787647B2 (en) 1997-01-13 2010-08-31 Micro Ear Technology, Inc. Portable system for programming hearing aids
US7929723B2 (en) 1997-01-13 2011-04-19 Micro Ear Technology, Inc. Portable system for programming hearing aids
US6351472B1 (en) 1998-04-30 2002-02-26 Siemens Audiologische Technik Gmbh Serial bidirectional data transmission method for hearing devices by means of signals of different pulsewidths
US9357317B2 (en) 2000-01-20 2016-05-31 Starkey Laboratories, Inc. Hearing aid systems
US9344817B2 (en) 2000-01-20 2016-05-17 Starkey Laboratories, Inc. Hearing aid systems
DE10115896A1 (de) * 2001-03-30 2002-11-14 Siemens Audiologische Technik Hörgerätesystem mit einem programmierbaren Hörgerät und einer Sende- und/oder Empfangseinheit, Sende- und/oder Empfangseinheit sowie programmierbares Hörgerät
EP1246504A3 (fr) * 2001-03-30 2005-01-12 Siemens Audiologische Technik GmbH Système de prothèse auditive avec une prothèse auditive programmable et une unité de transmission et/ou de réception, unité de transmission et/ou de réception ainsi que une prothèse auditive programmable
DE10115896C2 (de) * 2001-03-30 2003-12-24 Siemens Audiologische Technik Lösbar mit einem Hörgerät verbindbare Sende- und/oder Empfangseinheit sowie programmierbares Hörgerät
EP1246504A2 (fr) * 2001-03-30 2002-10-02 Siemens Audiologische Technik GmbH Système de prothèse auditive avec une prothèse auditive programmable et une unité de transmission et/ou de réception, unité de transmission et/ou de réception ainsi que une prothèse auditive programmable
EP1250026A1 (fr) * 2001-04-11 2002-10-16 Phonic Ear, Inc. Transfer de données courte portée pour dispositifs de communication
US8300862B2 (en) 2006-09-18 2012-10-30 Starkey Kaboratories, Inc Wireless interface for programming hearing assistance devices
EP2007024A2 (fr) * 2007-06-20 2008-12-24 Siemens Audiologische Technik GmbH Ensemble de dispositifs comprenant au moins un émetteur et procédé pour améliorer l'intensité de champ de réception
EP2007024A3 (fr) * 2007-06-20 2014-05-21 Siemens Audiologische Technik GmbH Ensemble de dispositifs comprenant au moins un émetteur et procédé pour améliorer l'intensité de champ de réception
WO2009112898A2 (fr) 2008-03-13 2009-09-17 Sony Ericsson Mobile Communications Ab Antenne destinée à être utilisée dans un écouteur et écouteur à antenne intégrée
US7652628B2 (en) 2008-03-13 2010-01-26 Sony Ericsson Mobile Communications Ab Antenna for use in earphone and earphone with integrated antenna
WO2009112898A3 (fr) * 2008-03-13 2010-04-15 Sony Ericsson Mobile Communications Ab Antenne destinée à être utilisée dans un écouteur et écouteur à antenne intégrée

Also Published As

Publication number Publication date
DE59005947D1 (de) 1994-07-07
DK0448764T3 (da) 1994-10-03
EP0448764B1 (fr) 1994-06-01
ATE106651T1 (de) 1994-06-15

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