EP1406468A2 - Hearing-aid device or hearing-aid system with a clock signal generator - Google Patents

Hearing-aid device or hearing-aid system with a clock signal generator 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
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EP
European Patent Office
Prior art keywords
hearing aid
signal
frequency
clock
clock signal
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Granted
Application number
EP03020770A
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German (de)
French (fr)
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EP1406468A3 (en
EP1406468B1 (en
Inventor
Kunibert Husung
Torsten Dr. Niederdränk
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Sivantos GmbH
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Siemens Audioligische Technik GmbH
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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
    • H04R25/55—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.

Abstract

The method involves generating frequency fluctuations in the clock signal generated by the clock generator (6). The frequency fluctuations are produced by modulating an internal clock signal produced by the clock generator with a further signal. The internal clock signal can be modified by a sinusoidal signal or with a noise signal. AN Independent claim is also included for the following: (a) a hearing aid device or system.

Description

Die Erfindung betrifft ein Hörhilfegerät oder Hörgerätesystem sowie ein Verfahren zum Betrieb eines Hörhilfegerätes oder Hörgerätesystems mit wenigstens einem Eingangswandler zur Aufnahme eines Eingangssignals und Wandlung in ein elektrisches Signal, einem A/D-Wandler zur Wandlung des elektrischen Eingangssignals in ein digitales Signal, einer digitalen Signalverarbeitungseinheit zur Verarbeitung des digitalen Signals, einem Taktgenerator zum Erzeugen eines Taktsignals zur Steuerung der digitalen Signalverarbeitungseinheit, einem Ausgangswandler und einer Sende- und/oder Empfangseinheit zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät oder Hörgerätesystem und einem weiteren Gerät.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.

Ein modernes Hörhilfegerät bietet die Möglichkeit zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät und einem weiteren Gerät, z.B. einem weiteren Hörhilfegerät, einem Programmiergerät oder einem externen Sende- und Empfangsgerät. Zum Senden und/oder Empfangen umfasst das Hörhilfegerät eine Sende- und/oder Empfangseinheit. Es sind aber auch Hörgerätesysteme mit einem Hörhilfegerät und einer Sende- und/oder Empfangseinheit bekannt, bei denen die Sende- und/oder Empfangseinheit als eigenständige, bezüglich des Hörhilfegerätes externe Baueinheit ausgebildet ist, die zum Senden- und/oder Empfangen lösbar mit dem Hörhilfegerät verbunden ist. Vorzugsweise ist die Sende- und oder Empfangseinheit dann auf das Hörhilfegerät aufgesteckt und über Kontakt- und Leitungsmittel elektrisch mit diesem verbunden. Es ist aber auch möglich, dass die Sende- und/oder Empfangseinheit nicht direkt am Hörhilfegerät befestigt ist, sondern als separates Gerät am Körper oder der Kleidung eines Hörgeräteträgers getragen wird. Die Verbindung zum Hörhilfegerät besteht dann lediglich über elektrische Kontakt- und Leitungsmittel. 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. But 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. Preferably the sending and / or receiving unit is then open the hearing aid plugged in and via contact and line means electrically connected to this. But it is also possible that 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.

Die Sende- und/oder Empfangseinheiten der betreffenden Geräte sind häufig als sogenannte "FM-Systeme" ausgebildet, so dass das übertragene Signal frequenzmoduliert ist. Eine Modulation des übertragenen Signals ist jedoch nicht notwendigerweise erforderlich und auch nicht auf eine Frequenzmodulation beschränkt.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. A modulation however, the transmitted signal is not necessary required and not limited to frequency modulation.

Aus der US 5,721,783 ist ein Hörgerät mit einem entfernt von dem Hörgerät befindlichen Prozessor bekannt, welches eine drahtlose Verbindung zwischen dem Hörgerät und dem Prozessor aufweist.From US 5,721,783 is a hearing aid with a removed from the hearing aid processor known, which a wireless connection between the hearing aid and the processor having.

Aus der DE 693 27 951 T2 ist ein Hörgerät bekannt, bei dem zum Ausgleich akustischer Rückkopplungen u.a. ein digitales Rauschsignal zum Mikrofonsignal hinzugefügt wird.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.

Bei modernen Hörhilfegeräten erfolgt die Signalverarbeitung digital. Zur Steuerung der dazu notwendigen digitalen Schaltungen ist ein Taktsignal erforderlich. Das Taktsignal eines digitalen Hörhilfegerätes ist meistens nicht sehr stabil. Schwingquarze zur Stabilisierung des Taktgenerators können wegen ihrer Größe nicht verwendet werden. Folglich ist die Taktfrequenz geringfügig temperatur- und versorgungsspannungsabhängig. Sie ist daher nur quasistabil. Dennoch kann das Taktsignal auch bei einem Hörhilfegerät für einen Betrachtungszeitraum von einigen Minuten als gleichmäßiges, stabiles Signal mit konstanter Periodendauer und Impulsbreite betrachtet werden.Signal processing takes place in modern hearing aids digital. To control the necessary digital circuits a clock signal is required. The clock signal of a digital hearing aid is usually not very stable. Quartz crystals to stabilize the clock generator can not used because of their size. Hence the Clock frequency slightly dependent on temperature and supply voltage. It is therefore only quasi-stable. Still can the clock signal also with a hearing aid for a period of observation of a few minutes as an even, stable signal with constant period and pulse width to be viewed as.

Durch den getakteten Betrieb des Hörhilfegerätes geht von dem Hörhilfegerät und insbesondere einer getakteten Endstufe ein elektromagnetisches Störsignal mit eben dieser Taktfrequenz aus. Weiterhin treten auch Störsignale bei Vielfachen dieser Taktfrequenz, auch Oberwellen oder Harmonische genannt, auf. So kann es vorkommen, dass die Empfangseinheit des Hörhilfegerätes oder Hörgerätesystems ein durch Oberwellen hervorgerufenes Signal detektiert, obwohl gar kein reales Empfangssignal für die Empfangseinheit vorhanden ist. Das Frequenzband, in dem das Empfangssignal liegt, ist normalerweise so gewählt, dass in dieses keine Harmonischen der Taktfrequenz hineinfallen. Eine langsam driftende Taktfrequenz des Taktgenerators kann nun dazu führen, dass Harmonische der Taktfrequenz innerhalb des Frequenzbandes des Empfangssignals liegen. Dadurch wird der Empfang durch die Empfangseinheit gestört.Because of the clocked operation of the hearing aid Hearing aid and in particular a clocked power amplifier electromagnetic interference signal with exactly this clock frequency out. Interference signals also occur at multiples of these Clock frequency, also called harmonics or harmonics. So it can happen that the receiving unit of the hearing aid or hearing aid system caused by harmonics Signal detected, although not a real reception signal at all is available for the receiving unit. The frequency band, in which the received signal is, is usually so chosen that in this no harmonics of the clock frequency fall in. A slowly drifting clock frequency of the clock generator can now cause harmonics of the clock frequency lie within the frequency band of the received signal. This interferes with reception by the receiving unit.

Bisher wurde über aufwändige Filterstufen weitgehend unzureichend versucht, die im Hörhilfegerät bereits bestehenden, schmalbandigen Störkomponenten, die sich insbesondere über die harmonischen Komponenten der Endstufengrundfrequenz bis hinein in den Frequenzbereich einiger 100 MHz erstrecken, zu eliminieren bzw. im Hörhilfegerät zu lokalisieren. Dennoch lässt sich eine hochfrequente Abstrahlung nicht vollständig vermeiden, was teilweise zu Störungen beim Betrieb einer Empfangseinheit führt. Weiterhin bringen geeignete Abschirmmaßnahmen am Hörhilfegerät Abhilfe gegenüber dieser hochfrequenten Abstrahlung. Alle genannten Maßnahmen sind jedoch sehr aufwändig und teuer.So far, extensive filter stages have largely been insufficient tries to use the existing ones in the hearing aid narrowband interfering components, which are particularly about the harmonic components of the basic amplifier frequency up to extend into the frequency range of a few 100 MHz eliminate or localize in the hearing aid. Yet high-frequency radiation cannot be completely avoid, which sometimes leads to malfunctions when operating a receiving unit leads. Suitable shielding measures also bring Remedy on the hearing aid against this high-frequency Radiation. However, all of the above measures are very complex and expensive.

Aufgabe der vorliegenden Erfindung ist es daher, elektromagnetische Störsignale bei Vielfachen der Taktfrequenz eines Hörhilfegerätes auf einfache und kostengünstige Weise zu vermeiden.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.

Diese Aufgabe wird gelöst durch ein Verfahren zum Betrieb eines Hörhilfegerätes oder Hörgerätesystems mit wenigstens einem Eingangswandler zur Aufnahme eines Eingangssignals und Wandlung in ein elektrisches Signal, einem A/D-Wandler zur Wandlung des elektrischen Eingangssignals in ein digitales Signal, einer digitalen Signalverarbeitungseinheit zur Verarbeitung des digitalen Signals, einem Taktgenerator zum Erzeugen eines Taktsignals zur Steuerung der digitalen Signalverarbeitungseinheit, einem Ausgangswandler und einer Sende- und/oder Empfangseinheit zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät oder Hörgerätesystem und einem weiteren Gerät, wobei bei dem Taktsignal, das von dem Taktgenerator ausgeht, Frequenzschwankungen erzeugt werden.This object is achieved by 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.

Ferner wird die Aufgabe gelöst durch ein Hörhilfegerät oder Hörgerätesystem mit wenigstens einem Eingangswandler zur Aufnahme eines Eingangssignals und Wandlung in ein elektrisches Signal, einem A/D-Wandler zur Wandlung des elektrischen Eingangssignals in ein digitales Signal, einer digitalen Signalverarbeitungseinheit, einem Taktgenerator zum Erzeugen eines Taktsignals zur Steuerung der digitalen Signalverarbeitungseinheit zur Verarbeitung des digitalen Signals, einem Ausgangswandler und einer Sende- und/oder Empfangseinheit zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät oder Hörgerätesystem und einem weiteren Gerät, wobei dem Taktgenerator eine Jitter-Einheit zugeordnet ist zum Erzeugen von Frequenzschwankungen bei dem Taktsignal.Furthermore, the task is solved by 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.

Bei dem Hörhilfegerät gemäß der Erfindung handelt es sich beispielsweise um ein hinter dem Ohr tragbares Hörhilfegerät, ein in dem Ohr tragbares Hörhilfegerät, ein implantierbares Hörhilfegerät oder ein Taschenhörhilfegerät. Weiterhin kann das Hörhilfegerät gemäß der Erfindung auch Teil eines mehrere Geräte zur Versorgung eines Schwerhörigen umfassenden Hörgerätesystems sein, z.B. Teil eines Hörgerätesystems mit zwei am Kopf getragenen Hörhilfegeräten zur binauralen Versorgung, Teil eines Hörgerätesystems mit einem am Kopf tragbaren Hörhilfegerät und einer am Körper tragbaren externen Prozessoreinheit, Teil eines ganz oder teilweise implantierbaren Hörgerätesystems mit mehreren Komponenten, Teil eines Hörgerätesystems mit externen Zusatzkomponenten wie Fernsteuereinheit oder externer Mikrofoneinheit, usw.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.

Ein Hörhilfegerät umfasst in der Regel einen oder mehrere Eingangswandler zur Aufnahme eines Eingangssignals. Der Eingangswandler ist beispielsweise als Mikrofon ausgebildet, das ein akustisches Signal aufnimmt und in ein elektrisches Signal wandelt. Als Eingangswandler kommen jedoch auch Einheiten in Betracht, die eine Spule oder eine Antenne aufweisen und die ein elektromagnetisches Signal aufnehmen und in ein elektrisches Signal wandeln. Ferner umfasst ein Hörhilfegerät üblicherweise eine Signalverarbeitungseinheit zur Verarbeitung und frequenzabhängigen Verstärkung des elektrischen Signals. Zur Signalverarbeitung im Hörhilfegerät dient ein vorzugsweise digitaler Signalprozessor (DSP), dessen Arbeitsweise mittels auf das Hörhilfegerät übertragbarer Programme oder Parameter beeinflussbar ist. Dadurch lässt sich die Arbeitsweise der Signalverarbeitungseinheit sowohl an den individuellen Hörverlust eines Hörgeräteträgers als auch an die aktuelle Hörsituation anpassen, in der das Hörhilfegerät gerade betrieben wird. Das so veränderte elektrische Signal ist schließlich einem Ausgangswandler zugeführt. Dieser ist in der Regel als Hörer ausgebildet, der das elektrische Ausgangssignal in ein akustisches Signal wandelt. Jedoch sind auch hier andere Ausführungsformen möglich, z.B. ein implantierbarer Ausgangswandler, der direkt mit einem Gehörknöchelchen verbunden ist und dieses zu Schwingungen anregt.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. However, 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. Also includes 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. This allows the way of working the signal processing unit to both the individual Hearing loss of a hearing aid wearer as well as the current one Adjust the hearing situation in which the hearing aid is currently is operated. The electrical signal so changed is finally fed to an output converter. This is in usually designed as a handset, the electrical output signal converts into an acoustic signal. However are other embodiments are also possible here, e.g. an implantable Output converter that directly with an ossicle is connected and this stimulates vibrations.

Zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät und einem weiteren Gerät kann das Hörhilfegerät gemäß der Erfindung eine Sende- und/oder Empfangseinheit umfassen. Es kann aber auch Teil eines Hörgerätesystems mit wenigstens einem Hörhilfegerät und einer Sende- und/oder Empfangseinheit sein, die als eigenständige Baueinheit außerhalb des Gehäuses des Hörhilfegerätes angeordnet ist.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.

Zum Betrieb eines digitalen Hörhilfegerätes mit einer digitalen Signalverarbeitungseinheit und einer digitalen Endstufe ist ein Taktgenerator erforderlich, der ein Taktsignal mit vordefinierten Eigenschaften abgibt. Die Erfindung sieht vor, dass das Taktsignal in begrenztem Umfang destabilisiert wird, d.h., auch über einen kurzen Betrachtungszeitraum von wenigen Sekunden treten Veränderungen in dem Taktsignal auf. Es kann damit nicht länger als periodische Folge aufeinanderfolgender, gleicher Taktimpulse betrachtet werden.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.

Zur Veränderung des Taktsignals stehen unterschiedliche Möglichkeiten zur Auswahl. So kann z.B. die Periodendauer schwanken oder die Impulsbreite variieren. Weiterhin kann auch die Flankensteilheit der Taktimpulse kurzzeitigen Schwankungen unterworfen sein.There are different ways of changing the clock signal to select. For example, the period fluctuate or the pulse width vary. Furthermore can also the edge steepness of the clock pulses is brief To be subject to fluctuations.

Die Destabilisierung des Taktsignals führt dazu, dass sowohl die Energieanteile der in dem Hörhilfegerät erzeugten Störsignale mit der Taktfrequenz als auch deren Harmonische auf ein größeres Frequenzband verteilt werden und damit die frequenzspezifische Energie geringer wird. Dies wiederum bedeutet, dass bei entsprechend bemessenen Schwankungen des Taktsignals die Amplitude eines durch die Harmonischen hervorgerufenen Störsignals unterhalb der Empfangsschwelle der Empfangseinheit liegt. Harmonische der Taktfrequenz führen daher nicht mehr zu Störungen beim drahtlosen Empfang eines Signals von einem externen Gerät. Allgemein bietet die Erfindung dadurch den Vorteil, dass ein Hörhilfegerät in Verbindung mit einem Signalübertragungssystem zur drahtlosen Signalübertragung eine störungsfreie Kommunikation ermöglicht.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. In general, 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.

Eine Ausführungsform der Erfindung sieht eine Jitter-Einheit vor, durch das geringfügige Frequenzschwankungen (Frequenz-Jitter) auf das Taktsignal aufgebracht werden. Zum Erzeugen der Frequenzschwankungen bei dem Taktsignal wird ein stabiles internes Taktsignal des Taktgenerators vorzugsweise mit einem weiteren Signal moduliert, d.h., einem weiteren Signal überlagert. Die Modulation erfolgt vorzugsweise mit einem Sinus- oder Rauschsignal, wobei deren Frequenzkomponenten vorteilhaft deutlich oberhalb des Audiofrequenzbereiches liegen und damit in diesem keine zusätzlichen Verzerrungen oder ein verstärktes Rauschen hervorrufen. Das mit dem internen Taktsignal modulierte Signal wird vorzugsweise so gewählt, dass die Frequenz des entstehenden Taktsignals um eine Mittenfrequenz schwankt. Diese Mittenfrequenz kann damit weiterhin als die Taktfrequenz des Systems betrachtet werden, wobei die reale Taktfrequenz dann in gleitendem Übergang abwechselnd für einige Perioden oberhalb der Mittenfrequenz und für einige Perioden unterhalb der Mittenfrequenz liegt. Vorteilhaft liegt die Frequenz der Taktschwankungen oberhalb des hörbaren Audiofrequenzbereiches, so dass die Taktschwankungen nicht zu hörbaren Verzerrungen bei dem Ausgangssignal des Hörhilfegerätes führen.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.

Weitere Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Es zeigen:

  • Figur 1 das Blockschaltbild eines digitalen Hörhilfegerätes mit einer Jitter-Einheit,
  • Figur 2 ein ungestörtes Empfangssignal,
  • Figur 3 ein Empfangssignal mit überlagertem Störspektrum,
  • Figur 4 das Störspektrum und
  • Figur 5 das Störspektrum unter dem Einfluss der Jitter-Einheit.
    • Further details of the invention result from the following description of an exemplary embodiment. Show it:
  • FIG. 1 shows the block diagram of a digital hearing aid with a jitter unit,
  • FIG. 2 shows an undisturbed received signal,
  • FIG. 3 shows a received signal with a superimposed interference spectrum,
  • Figure 4 shows the interference spectrum and
  • 5 shows the interference spectrum under the influence of the jitter unit.

    • Figur 1 zeigt ein Ausführungsbeispiel für ein Hörhilfegerät gemäß der Erfindung im Blockschaltbild. Zur Schallaufnahme dient ein Mikrofon 1, das ein akustisches Eingangssignal aufnimmt und in ein elektrisches Eingangssignal wandelt. Das elektrische Eingangssignal ist zunächst einer Vorverstärker- und A/D-Wandler-Einheit 2 zugeführt. Diese wandelt das analoge Eingangssignal in ein digitales Eingangssignal. Zur Weiterverarbeitung und frequenzabhängigen Verstärkung des digitalen Eingangssignals dient die digitale Signalverarbeitungseinheit 3. Diese umfasst zur Endverstärkung einen Class-D-Verstärker. Schließlich wird das verarbeitete und verstärkte Signal mittels eines Hörers 4 in ein analoges akustisches Ausgangssignal gewandelt und abgegeben. Zur Spannungsversorgung der Hörgeräte-Komponenten ist eine Batterie 5 vorhanden. Weiterhin ist die digitale Signalverarbeitungseinheit des Hörhilfegerätes mit einem Taktgenerator 6 verbunden. Bei dem Hörhilfegerät im Ausführungsbeispiel gemäß Figur 1 ist neben dem Mikrofon 1 als weiterer Signaleingang eine Telefonspule 7 vorgesehen, durch die ein elektromagnetisches Eingangssignal aufgenommen werden kann. Das Hörhilfegerät umfasst weiterhin einen von einem Hörgeräteträger bedienbaren MTO-Schalter 8 zur Wahl des Betriebes über das Mikrofon (Schaltstellung M), über die Telefonspule (Schaltstellung T) oder zum Ausschalten des Hörhilfegerätes (Schaltstellung O). Darüber hinaus umfasst das Hörhilfegerät eine Programmierbuchse 9 zur drahtgebundenen Verbindung mit einem Programmiergerät sowie eine Situationstaste 10 zum Umschalten zwischen verschiedenen Hörprogrammen durch den Hörgeräteträger. Als weiteres Bedienelement ist ein VC-Steller 11 vorhanden, durch den sich die Lautstärke manuell am Hörhilfegerät einstellen lässt.Figure 1 shows an embodiment of a hearing aid according to the invention in block diagram. For sound recording serves 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. For further processing and frequency-dependent amplification of the digital The digital signal processing unit is used for the input signal 3. This includes a Class D amplifier for final amplification. Finally, the processed and reinforced Signal by means of a receiver 4 into an analog acoustic Output signal converted and delivered. For power supply of the hearing aid components there is a battery 5. Furthermore, the digital signal processing unit of the Hearing aid connected to a clock generator 6. In which 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). Also includes 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. As another control element there is a VC actuator 11 through which the Have the volume set manually on the hearing aid.

    Das Hörhilfegerät gemäß der Erfindung ist zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät und einem weiteren Gerät, z.B. einem weiteren Hörhilfegerät, mit einer Sende- und/oder Empfangseinheit 12 verbunden, die eine Antenne 13 umfasst. Dabei kann die Sende- und/oder Empfangseinheit 12 direkt in das Gehäuse des Hörhilfegerätes integriert und somit Teil des Hörhilfegerätes sein. Die Sende- und/oder Empfangseinheit 12 kann aber auch ein eigenes Gehäuse aufweisen und als eigenständige externe Baueinheit zusammen mit dem Hörhilfegerät ein Hörgerätesystem bilden. Dabei kann zum Betrieb eines derartigen Hörgerätesystems eine Befestigung der externen Sende- und/oder Empfangseinheit an dem Gehäuse des Hörhilfegerätes vorgesehen sein, die externe Sende- und/oder Empfangseinheit kann aber auch separat am Körper, z.B. als Brust- oder Taschengerät, getragen werden und lediglich über elektrische Verbindungsmittel mit dem Hörhilfegerät verbunden sein. The hearing aid device according to the invention 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. In this case, 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.

    Schließlich weist das Hörhilfegerät gemäß der Erfindung eine mit dem Taktgenerator 6 verbundene Jitter-Einheit 14 auf. Die Jitter-Einheit 14 bewirkt einen Frequenz-Jitter des von dem Taktgenerator 6 ausgehenden Taktsignals. Der Frequenz-Jitter kann z.B. durch die Überlagerung eines stabilen internen Taktsignals des Taktgenerators mit einem Sinussignal oder mit einem Rauschsignal hervorgerufen werden. Vorteilhaft liegt dabei die Frequenz des überlagerten Signals oberhalb des Audiofrequenzbereiches, so dass durch die Überlagerungen keine wahrnehmbaren Störungen im Ausgangssignal des Hörhilfegerätes entstehen. Durch die so hervorgerufenen Frequenzschwankungen bei dem Taktsignal wird erreicht, dass sowohl die Energieanteile von Störsignalen mit der Taktfrequenz als auch deren Harmonische auf ein größeres Frequenzband verteilt werden und damit die frequenzspezifische Energie geringer wird. Durch die getaktete Arbeitsweise des Hörhilfegerätes hervorgerufene Störsignale bei der verwendeten Taktfrequenz und deren Harmonische können dadurch zwar weiterhin von der Antenne 13 oder der Telefonspule 7 erfasst werden, sie liegen nun jedoch unter der Eingangsschwelle der Sende- und/oder Empfangseinheit 12 bzw. des Vorverstärkers mit A/D-Wandler 2 und führen somit nicht mehr zu Störungen eines von der Sende- und/oder Empfangseinheit bzw. der Telefonspule 7 empfangenen oder abgegebenen Nutzsignals.Finally, 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. By the clocked mode of operation of the hearing aid 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.

    Figur 2 zeigt das Frequenzspektrum eines von der Sende- und/oder Empfangseinheit 12 aufgenommenen elektromagnetischen Signals mit einer Trägerfrequenz von 1 MHz. Das empfangene Signal gemäß Figur 2 ist nicht durch ein Taktsignal gestört. Anders hingegen das Signal gemäß Figur 3. Bei diesem Signal ist deutlich sichtbar ein Störsignal überlagert, das sich aus den Harmonischen der Taktfrequenz des Hörhilfegerätes zusammensetzt. Zur Verdeutlichung zeigt Figur 4 das Störspektrum ohne das Empfangssignal. Wird nun bei der zuletzt genannten Ausgangssituation gemäß der Erfindung ein Frequenz-Jitter bei dem Taktsignal erzeugt, so wird, wie in Figur 5 veranschaulicht, das Störspektrum wieder geglättet. Die Störsignale liegen nun wieder unterhalb einer Empfangsschwelle der Sende- und/oder Empfangseinheit 12, wodurch eine störungsfreie Signalübertragung zwischen dem Hörhilfegerät und einem weiteren Gerät ermöglicht wird.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. However, 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. For clarification, 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.

    Claims (14)

    Verfahren zum Betrieb eines Hörhilfegerätes oder Hörgerätesystems mit wenigstens einem Eingangswandler zur Aufnahme eines Eingangssignals und Wandlung in ein elektrisches Signal, einem A/D-Wandler zur Wandlung des elektrischen Eingangssignals in ein digitales Signal, einer digitalen Signalverarbeitungseinheit (3) zur Verarbeitung des digitalen Signals, einem Taktgenerator (6) zum Erzeugen eines Taktsignals zur Steuerung der digitalen Signalverarbeitungseinheit (3), einem Ausgangswandler und einer Sende- und/oder Empfangseinheit (12) zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät oder Hörgerätesystem und einem weiteren Gerät, dadurch gekennzeichnet, dass bei dem Taktsignal, das von dem Taktgenerator (6) ausgeht, Frequenzschwankungen erzeugt werden.Method for operating a hearing aid device or hearing aid system with at least one input converter for receiving an input signal and converting it into an electrical signal, an A / D converter for converting the electrical input signal into a digital signal, a digital signal processing unit (3) for processing the digital signal, a clock generator (6) for generating a clock signal for controlling the digital signal processing unit (3), an output converter and a transmitting and / or receiving unit (12) for wireless signal transmission between the hearing aid or hearing aid system and another device, characterized in that the Clock signal emanating from the clock generator (6), frequency fluctuations are generated. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zum Erzeugen der Frequenzschwankungen ein von dem Taktgenerator (6) erzeugtes internes Taktsignal mit einem weiteren Signal moduliert wird.Method according to Claim 1, characterized in that an internal clock signal generated by the clock generator (6) is modulated with a further signal in order to generate the frequency fluctuations. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das interne Taktsignal mit einem Sinussignal moduliert wird.A method according to claim 2, characterized in that the internal clock signal is modulated with a sine signal. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das interne Taktsignal mit einem Rauschsignal moduliert wird.A method according to claim 2, characterized in that the internal clock signal is modulated with a noise signal. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Frequenz des weiteren Signals oberhalb des hörbaren Frequenzbereiches liegt. Method according to one of claims 2 to 4, characterized in that the frequency of the further signal is above the audible frequency range. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Frequenz des Taktsignals um eine Mittenfrequenz schwankt.Method according to one of claims 1 to 5, characterized in that the frequency of the clock signal fluctuates around a center frequency. Hörhilfegerät oder Hörgerätesystem mit wenigstens einem Eingangswandler zur Aufnahme eines Eingangssignals und Wandlung in ein elektrisches Signal, einem A/D-Wandler zur Wandlung des elektrischen Eingangssignals in ein digitales Signal, einer digitalen Signalverarbeitungseinheit (3) zur Verarbeitung des digitalen Signals, einem Taktgenerator (6) zum Erzeugen eines Taktsignals zur Steuerung der digitalen Signalverarbeitungseinheit (3), einem Ausgangswandler und einer Sende- und/oder Empfangseinheit (12) zur drahtlosen Signalübertragung zwischen dem Hörhilfegerät oder Hörgerätesystem und einem weiteren Gerät, dadurch gekennzeichnet, dass dem Taktgenerator (6) eine Jitter-Einheit (14) zugeordnet ist zum Erzeugen von Frequenzschwankungen bei dem Taktsignal.Hearing aid 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 converting the electrical input signal into a digital signal, a digital signal processing unit (3) for processing the digital signal, a clock generator (6 ) for generating a clock signal for controlling the digital signal processing unit (3), an output converter and a transmitting and / or receiving unit (12) for wireless signal transmission between the hearing aid or hearing aid system and another device, characterized in that the clock generator (6) has a Jitter unit (14) is assigned to generate frequency fluctuations in the clock signal. Hörhilfegerät oder Hörgerätesystem nach Anspruch 7, dadurch gekennzeichnet, dass zum Erzeugen der Frequenzschwankungen das Taktsignals ein internes Taktsignal des Taktgenerators (6) mit einem weiteren Signal modulierbar ist.Hearing aid or hearing aid system according to claim 7, characterized in that an internal clock signal of the clock generator (6) can be modulated with a further signal to generate the frequency fluctuations. Hörhilfegerät oder Hörgerätesystem nach Anspruch 8, dadurch gekennzeichnet, dass das interne Taktsignal mit einem Sinussignal modulierbar ist.Hearing aid or hearing aid system according to claim 8, characterized in that the internal clock signal can be modulated with a sinusoidal signal. Hörhilfegerät oder Hörgerätesystem nach Anspruch 8, dadurch gekennzeichnet, dass das interne Taktsignal mit einem Rauschsignal modulierbar ist.Hearing aid or hearing aid system according to claim 8, characterized in that the internal clock signal can be modulated with a noise signal. Hörhilfegerät oder Hörgerätesystem nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die Frequenz des weiteren Signals oberhalb des hörbaren Frequenzbereiches liegt. Hearing aid or hearing aid system according to one of claims 8 to 10, characterized in that the frequency of the further signal is above the audible frequency range. Hörhilfegerät oder Hörgerätesystem nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass die Frequenz des Taktsignals um eine Mittenfrequenz schwankt.Hearing aid or hearing aid system according to one of claims 7 to 11, characterized in that the frequency of the clock signal fluctuates around a center frequency. Hörhilfegerät nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, dass die Sende- und/oder Empfangseinheit (12) in das Hörhilfegerät integriert ist.Hearing aid device according to one of claims 7 to 12, characterized in that the transmitting and / or receiving unit (12) is integrated in the hearing aid device. Hörgerätesystem nach einem der Ansprüche 7 bis 12, gekennzeichnet durch ein Hörhilfegerät und eine externe, mit dem Hörhilfegerät verbundene Sende- und/oder Empfangseinheit (12).Hearing aid system according to one of claims 7 to 12, characterized by a hearing aid and an external transmitting and / or receiving unit (12) connected to the hearing aid.
    EP03020770A 2002-09-30 2003-09-12 Hearing-aid device or hearing-aid system with a clock signal generator Expired - Lifetime EP1406468B1 (en)

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

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