EP1406468A2 - Prothèse auditive ou système de prothèse auditive avec un générateur de signal d'horloge - Google Patents

Prothèse auditive ou système de prothèse auditive avec un générateur de signal d'horloge Download PDF

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Publication number
EP1406468A2
EP1406468A2 EP03020770A EP03020770A EP1406468A2 EP 1406468 A2 EP1406468 A2 EP 1406468A2 EP 03020770 A EP03020770 A EP 03020770A EP 03020770 A EP03020770 A EP 03020770A EP 1406468 A2 EP1406468 A2 EP 1406468A2
Authority
EP
European Patent Office
Prior art keywords
hearing aid
signal
frequency
clock
clock signal
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
EP03020770A
Other languages
German (de)
English (en)
Other versions
EP1406468A3 (fr
EP1406468B1 (fr
Inventor
Kunibert Husung
Torsten Dr. Niederdränk
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
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 Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1406468A2 publication Critical patent/EP1406468A2/fr
Publication of EP1406468A3 publication Critical patent/EP1406468A3/fr
Application granted granted Critical
Publication of EP1406468B1 publication Critical patent/EP1406468B1/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
    • H04R25/554—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 using a wireless connection, e.g. between microphone and amplifier or using Tcoils

Definitions

  • the invention relates to a hearing aid or hearing aid system and a method for operating a hearing aid or Hearing aid system with at least one input converter for Recording an input signal and converting it into an electrical one Signal, an A / D converter for converting the electrical Input signal in a digital signal, a digital signal processing unit for processing the digital signal, a clock generator for generating a clock signal for Control of the digital signal processing unit, one Output converter and a transmitting and / or receiving unit for wireless signal transmission between the hearing aid or Hearing aid system and another device.
  • a modern hearing aid offers the possibility of wireless Signal transmission between the hearing aid and one other device, e.g. another hearing aid, a programming device or an external transceiver.
  • the hearing aid device comprises one for transmitting and / or receiving Sending and / or receiving unit.
  • they are also hearing aid systems with a hearing aid and a transmitting and / or Receiving unit known, in which the transmitting and / or receiving unit as an independent, with regard to the hearing aid external unit is designed to send and / or Receiving is detachably connected to the hearing aid.
  • the sending and / or receiving unit is then open the hearing aid plugged in and via contact and line means electrically connected to this.
  • the sending and / or receiving unit is not direct attached to the hearing aid, but as a separate device worn on the body or clothing of a hearing aid wearer becomes. The connection to the hearing aid then only exists about electrical contact and conduction means.
  • the sending and / or receiving units of the devices in question are often designed as so-called "FM systems", so that the transmitted signal is frequency modulated.
  • FM systems so that the transmitted signal is frequency modulated.
  • a modulation however, the transmitted signal is not necessary required and not limited to frequency modulation.
  • a hearing aid is known from DE 693 27 951 T2, in which to compensate acoustic feedback etc. a digital one Noise signal is added to the microphone signal.
  • the object of the present invention is therefore electromagnetic Interference signals at multiples of the clock frequency Avoid hearing aid in a simple and inexpensive way.
  • a method for operating a Hearing aid device or hearing aid system with at least one Input converter for receiving an input signal and Conversion into an electrical signal, an A / D converter for Conversion of the electrical input signal into a digital one Signal, a digital signal processing unit for processing of the digital signal, a clock generator for generating a clock signal for controlling the digital signal processing unit, an output converter and one Transmitting and / or receiving unit for wireless signal transmission between the hearing aid or hearing aid system and one another device, the clock signal from the clock generator goes out, frequency fluctuations are generated.
  • a hearing aid or Hearing aid system with at least one input converter for recording of an input signal and conversion into an electrical one Signal, an A / D converter for converting the electrical input signal into a digital signal, a digital signal processing unit, a clock generator for generating a Clock signal for controlling the digital signal processing unit for processing the digital signal, an output converter and a transmitting and / or receiving unit for wireless signal transmission between the hearing aid or Hearing aid system and another device, the clock generator a jitter unit is assigned to generate Frequency fluctuations in the clock signal.
  • the hearing aid according to the invention is for example, a hearing aid that can be worn behind the ear, a hearing aid that can be worn in the ear, an implantable one Hearing aid or a pocket hearing aid. Furthermore can the hearing aid according to the invention also part of a plurality Devices for supplying a hearing aid system comprising hearing loss be, e.g. Part of a hearing aid system with two hearing aids worn on the head for binaural care, Part of a hearing aid system with a hearing aid that can be worn on the head and an external processor unit that can be worn on the body, Part of a fully or partially implantable hearing aid system with several components, part of a hearing aid system with external additional components such as remote control unit or external microphone unit, etc.
  • a hearing aid usually includes one or more Input converter for receiving an input signal.
  • the input converter is designed, for example, as a microphone records an acoustic signal and converts it into an electrical signal converts.
  • units also come as input converters that have a coil or an antenna and which pick up an electromagnetic signal and convert it into an electrical one Convert signal.
  • a hearing aid usually a signal processing unit for processing and frequency-dependent amplification of the electrical signal.
  • A is preferably used for signal processing in the hearing aid device digital signal processor (DSP), its mode of operation by means of programs which can be transmitted to the hearing aid or Parameter can be influenced.
  • DSP digital signal processor
  • the hearing aid device For wireless signal transmission between the hearing aid and a further device can the hearing aid device according to the invention comprise a transmitting and / or receiving unit. It can also be part of a hearing aid system with at least one Hearing aid and a transmitting and / or receiving unit be that as an independent unit outside the housing of the hearing aid is arranged.
  • a clock generator For operating a digital hearing aid with a digital one Signal processing unit and a digital output stage a clock generator is required which has a clock signal predefined properties.
  • the invention provides that the clock signal is destabilized to a limited extent, i.e., even over a short observation period of a few Seconds occur changes in the clock signal. It can thus no longer as a periodic sequence of successive same clock pulses are considered.
  • the period fluctuate or the pulse width vary.
  • the edge steepness of the clock pulses is brief To be subject to fluctuations.
  • the destabilization of the clock signal causes both the energy components of the interference signals generated in the hearing aid with the clock frequency as well as their harmonics a larger frequency band can be distributed and thus the frequency-specific Energy becomes lower.
  • This in turn means that with appropriately sized fluctuations in the clock signal the amplitude of one caused by the harmonics Interference signal below the reception threshold of the receiving unit lies. Harmonics of the clock frequency therefore lead no more interference with wireless reception of a signal from an external device.
  • the invention thereby offers the advantage that a hearing aid in conjunction with a signal transmission system for wireless signal transmission enables trouble-free communication.
  • One embodiment of the invention provides a jitter unit due to the slight frequency fluctuations (frequency jitter) be applied to the clock signal.
  • To create the frequency fluctuations in the clock signal becomes stable internal clock signal of the clock generator preferably with a modulated another signal, i.e. superimposed on another signal.
  • the modulation is preferably carried out with a Sine or noise signal, the frequency components of which are advantageous are well above the audio frequency range and so that there is no additional distortion or an intensification Cause noise. That with the internal clock signal modulated signal is preferably chosen so that the Frequency of the resulting clock signal around a center frequency fluctuates.
  • This center frequency can therefore continue as the Clock frequency of the system are considered, the real Clock frequency then alternating for some in smooth transition Periods above the center frequency and for some periods is below the center frequency. It is advantageous the frequency of the clock fluctuations above the audible audio frequency range, so the clock fluctuations don't get too audible distortion in the output signal of the hearing aid to lead.
  • Figure 1 shows an embodiment of a hearing aid according to the invention in block diagram.
  • a microphone 1 which records an acoustic input signal and converts it into an electrical input signal.
  • the electrical The input signal is initially one Preamplifier and A / D converter unit 2 supplied. This changes the analog Input signal into a digital input signal.
  • the digital signal processing unit is used for the input signal 3. This includes a Class D amplifier for final amplification.
  • the processed and reinforced Signal by means of a receiver 4 into an analog acoustic Output signal converted and delivered.
  • a battery 5 For power supply of the hearing aid components there is a battery 5.
  • the digital signal processing unit of the Hearing aid connected to a clock generator 6.
  • Hearing aid in the embodiment of Figure 1 is next to the microphone 1 as a further signal input a telephone coil 7 provided by which an electromagnetic input signal can be included.
  • the hearing aid also includes an MTO switch 8 that can be operated by a hearing device wearer to select the operation via the microphone (switch position M), via the telephone coil (switch position T) or to switch it off of the hearing aid (switch position O).
  • the hearing aid has a programming socket 9 for wired Connection to a programming device and a situation key 10 to switch between different hearing programs through the hearing aid wearer.
  • the hearing aid device is for wireless signal transmission between the hearing aid and another Device, e.g. another hearing aid, with a Transmitter and / or receiver unit 12 connected, which has an antenna 13 includes.
  • the transmitting and / or receiving unit 12 integrated directly into the housing of the hearing aid and thus Be part of the hearing aid.
  • the sending and / or receiving unit 12 can also have its own housing and as an independent external unit together with the Hearing aid form a hearing aid system. It can be used to operate of such a hearing aid system an attachment of external transmitting and / or receiving unit on the housing of the Hearing aid can be provided, the external transmission and / or
  • the receiving unit can also be mounted separately on the body, e.g. as Breast or pocket device, to be worn and only over electrical connection means connected to the hearing aid his.
  • the hearing aid according to the invention has one connected to the clock generator 6 jitter unit 14.
  • the Jitter unit 14 causes a frequency jitter of that Clock generator 6 outgoing clock signal.
  • the frequency jitter can e.g. by overlaying a stable internal Clock signal of the clock generator with a sine signal or with a noise signal. It is advantageous the frequency of the superimposed signal above the audio frequency range, so through the overlays none perceptible disturbances in the output signal of the hearing aid arise. Due to the frequency fluctuations caused in this way the clock signal ensures that both the energy components of interference signals with the clock frequency as well as their Harmonics can be distributed over a larger frequency band and so that the frequency-specific energy is lower.
  • Interference signals at the clock frequency used and their harmonics can thereby continue from the antenna 13 or the telephone coil 7 are detected, but they are now below the input threshold of the transmitting and / or receiving unit 12 or the preamplifier with A / D converter 2 and thus lead no more interference from one of the transmitter and / or receiver unit or the telephone coil 7 received or given Useful signal.
  • Figure 2 shows the frequency spectrum of one of the Transmitting and / or receiving unit 12 recorded electromagnetic Signals with a carrier frequency of 1 MHz.
  • the received The signal according to FIG. 2 is not disturbed by a clock signal.
  • the signal according to FIG. 3 is different. With this signal there is a clearly visible interference signal superimposed on it the harmonics of the clock frequency of the hearing aid.
  • Figure 4 shows the interference spectrum without the received signal. Will now with the latter Starting situation according to the invention a frequency jitter the clock signal is generated, as illustrated in FIG. 5, the interference spectrum smoothed again.
  • the interference signals are now below a reception threshold of Transmitting and / or receiving unit 12, which ensures interference-free signal transmission between the hearing aid and another Device is enabled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Electric Clocks (AREA)
  • Manipulation Of Pulses (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP03020770A 2002-09-30 2003-09-12 Prothèse auditive ou système de prothèse auditive avec un générateur de signal d'horloge Expired - Lifetime EP1406468B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10245556A DE10245556B3 (de) 2002-09-30 2002-09-30 Hörhilfegerät oder Hörgerätesystem mit einem Taktgenerator und Verfahren zu deren Betrieb
DE10245556 2002-09-30

Publications (3)

Publication Number Publication Date
EP1406468A2 true EP1406468A2 (fr) 2004-04-07
EP1406468A3 EP1406468A3 (fr) 2008-11-05
EP1406468B1 EP1406468B1 (fr) 2010-08-04

Family

ID=31984270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020770A Expired - Lifetime EP1406468B1 (fr) 2002-09-30 2003-09-12 Prothèse auditive ou système de prothèse auditive avec un générateur de signal d'horloge

Country Status (5)

Country Link
US (1) US7421085B2 (fr)
EP (1) EP1406468B1 (fr)
AT (1) ATE476831T1 (fr)
DE (2) DE10245556B3 (fr)
DK (1) DK1406468T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1624723B1 (fr) * 2004-08-02 2012-05-30 Siemens Audiologische Technik GmbH Stabilisation de la cadence du système dans une prothèse auditive
DE602005008776D1 (de) * 2005-01-17 2008-09-18 Widex As Vorrichtung und verfahren zum betrieb eines hörgeräts
DE102007018121B4 (de) 2007-04-16 2012-12-06 Siemens Medical Instruments Pte. Ltd. Hörvorrichtung mit störarmer Höreransteuerung und entsprechendes Verfahren sowie Hörsystem
US8520881B2 (en) * 2007-04-16 2013-08-27 Siemens Medical Instruments Pte. Ltd. Hearing apparatus with low-interference receiver control and corresponding method
WO2008141677A1 (fr) * 2007-05-24 2008-11-27 Phonak Ag Dispositif auditif à communication rf
US8213652B2 (en) 2007-07-02 2012-07-03 Siemens Medical Instruments Pte. Ltd. Multi-component hearing aid system and a method for its operation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5721783A (en) 1995-06-07 1998-02-24 Anderson; James C. Hearing aid with wireless remote processor
DE69327951T2 (de) 1992-03-31 2000-08-17 Gn Resound A S Taastrup Hörgerät mit ausgleich der akustischen rückkopplung
DE19941859A1 (de) 1999-09-02 2001-03-15 Siemens Audiologische Technik Netzunabhängig betreibbares medizinisches Gerät
WO2002007479A1 (fr) 2000-07-14 2002-01-24 Gn Resound A/S Systeme auditif biauriculaire synchronise
US6411151B1 (en) 1999-12-13 2002-06-25 Inter Corporation Low jitter external clocking

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781695A (en) * 1972-05-04 1973-12-25 Westinghouse Electric Corp Digital phase-locked-loop
US4818950A (en) * 1987-04-24 1989-04-04 Ncr Corporation Low jitter phase-locked loop
US4862485A (en) * 1987-10-14 1989-08-29 National Semiconductor Corporation Quotient phase-shift processor for digital phase-locked-loops
JPH0795056A (ja) * 1993-05-10 1995-04-07 Internatl Business Mach Corp <Ibm> 可変周波数基準クロック生成装置
DE19734222A1 (de) * 1997-08-07 1999-02-18 Siemens Audiologische Technik Schaltung und Verfahren zur Digitalwandlung einer analogen Stellgröße in einem digitalen Hörgerät
US6329929B1 (en) * 1998-12-21 2001-12-11 Medtronic Inc. Telemetry system with phase-locking noise suppressing receiver
US7227920B2 (en) * 2001-06-26 2007-06-05 Nokia Corporation Circuit and method for correcting clock duty cycle
ATE347245T1 (de) * 2001-09-21 2006-12-15 Microsound As Hörgerät mit leistungsoptimiertem stromverbrauch für variablen takt, variable versorgungsspannung und variable dsp-verarbeitungsparameter
US20030210029A1 (en) * 2002-05-07 2003-11-13 Billy Antheunisse Coherent clock measurement unit
EP1367857B1 (fr) * 2002-05-30 2012-04-25 GN Resound A/S Procédé d'acquisition de données pour prothèses auditives

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69327951T2 (de) 1992-03-31 2000-08-17 Gn Resound A S Taastrup Hörgerät mit ausgleich der akustischen rückkopplung
US5721783A (en) 1995-06-07 1998-02-24 Anderson; James C. Hearing aid with wireless remote processor
DE19941859A1 (de) 1999-09-02 2001-03-15 Siemens Audiologische Technik Netzunabhängig betreibbares medizinisches Gerät
US6411151B1 (en) 1999-12-13 2002-06-25 Inter Corporation Low jitter external clocking
WO2002007479A1 (fr) 2000-07-14 2002-01-24 Gn Resound A/S Systeme auditif biauriculaire synchronise

Also Published As

Publication number Publication date
DE10245556B3 (de) 2004-04-22
ATE476831T1 (de) 2010-08-15
EP1406468A3 (fr) 2008-11-05
EP1406468B1 (fr) 2010-08-04
DE50312942D1 (de) 2010-09-16
US20040109577A1 (en) 2004-06-10
DK1406468T3 (da) 2010-11-08
US7421085B2 (en) 2008-09-02

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