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EP1530402B2 - Method for adapting a hearing aid considering the position of head and corresponding hearing aid - Google Patents
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EP1530402B2 - Method for adapting a hearing aid considering the position of head and corresponding hearing aid - Google Patents

Method for adapting a hearing aid considering the position of head and corresponding hearing aid Download PDF

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Publication number
EP1530402B2
EP1530402B2 EP04024545.8A EP04024545A EP1530402B2 EP 1530402 B2 EP1530402 B2 EP 1530402B2 EP 04024545 A EP04024545 A EP 04024545A EP 1530402 B2 EP1530402 B2 EP 1530402B2
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EP
European Patent Office
Prior art keywords
head
hearing aid
determining
acoustic signal
input signals
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Expired - Lifetime
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EP04024545.8A
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German (de)
French (fr)
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EP1530402A2 (en
EP1530402A3 (en
EP1530402B1 (en
Inventor
Josef Chalupper
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Sivantos GmbH
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Sivantos GmbH
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Publication of EP1530402B1 publication Critical patent/EP1530402B1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/55—Electric hearing aids using an external connection, either wireless or wired
    • H04R25/552—Binaural
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility

Definitions

  • the present invention relates to a hearing device which is adaptable to the spatial direction of an incoming sound signal, comprising a plurality of microphones for receiving input signals and a computing device for calculating at least one direction from which a predeterminable sound signal arrives. Moreover, the present invention relates to a corresponding method for adapting a hearing device to at least one spatial direction of the sound incidence.
  • BSS blind source separation
  • a portable sound reproduction device for generating a three-dimensional sound impression For example, a portable sound reproduction device for generating a three-dimensional sound impression is known.
  • a device for determining the head orientation is integrated in a portable sound reproduction device, in particular headphones or a helmet with integrated sound generators.
  • the virtual sound waves do not follow the head movements of the listener and the artificially induced three-dimensional sound perception corresponds to the natural sound perception in real stationary sound sources.
  • WO 99/43185 A a binaural digital hearing aid system.
  • the hearing aids used in this case each have a transmission device for wireless transmission.
  • the object of the present invention is therefore to be able to perform source separation despite head movements in a reasonable time frame in hearing aids.
  • this object is achieved by a hearing aid according to claim 1.
  • the blind source separation can also be used in hearing aids, which can be increased dramatically in certain situations, the speech intelligibility.
  • the hearing device preferably has a transmission device for the wireless transmission of the head position to the second hearing device.
  • a transmission device for the wireless transmission of the head position to the second hearing device.
  • the transmission device is provided in many cases with binaural supply anyway in the hearing aid.
  • the position determining device can be designed so that the position of the head is determined based on the geomagnetic field. This has the advantage that not only a relative but also an absolute position of the head could be determined.
  • the position-determining device can be configured such that the head position is determined with the aid of an acceleration sensor. This has the advantage that a common technology with robust components can be used.
  • a head movement in the adapted state of the hearing aid is taken into account.
  • the current head position is already taken into account during the adaptation process in the hearing device. As a result, the time for adjusting the hearing device can be further reduced.
  • a hearing aid as shown in the drawing has a plurality of microphones M1, Mn.
  • the signals of the microphones are recorded by a preprocessing unit VV.
  • a position determination unit PB also supplies the current head position to the preprocessing unit VV.
  • the preprocessed signals of preprocessing unit VV are sent in parallel to an adaptive processing and demixing unit VE forwarded.
  • the unit VE supplies the signals of the various sources Q1, Qk.
  • the head position of the position determination unit PB can also be supplied to the processing and demixing unit VE.
  • head trackers As a position determining device PB so-called "head trackers", for example, use the earth's magnetic field for position determination, commercially available. In the case of use, the head tracker constantly passes on the current head position to the preprocessing unit VV. In the case of binaural supply, this information is preferably also transmitted wirelessly to the hearing device on the other side of the head.
  • the current position is offset with the microphone signals such that in the case of a head movement, the change in direction of the microphones due to the head movement is considered so that no new adaptation must be performed as long as the external speakers or sound sources do not change their positions , If the head movement already takes place during the adaptation, the head movement must be registered accordingly. In this case, the adaptation process must take into account the time dependency of the signals.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Stereophonic System (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The aid has microphones (M1-Mn) for acquiring a set of input signals. A position determining unit (PB) e.g. head tracker, detects a position of the head of a user of the hearing aid using earth`s magnetic field. A processing and separation unit (VE) identifies relative change in acoustic source positions based on the position of the head detected by the position determining unit. Independent claims are also included for the following: (A) a hearing aid system having a hearing aid (B) a method of adapting a hearing aid.

Description

Die vorliegende Erfindung betrifft ein Hörgerät, das an die räumliche Richtung eines eintreffenden Schallsignals adaptierbar ist, mit mehreren Mikrofonen zum Aufnehmen von Eingangssignalen und einer Recheneinrichtung zum Berechnen mindestens einer Richtung, aus der ein vorgebbares Schallsignal eintrifft. Darüber hinaus betrifft die vorliegende Erfindung ein entsprechendes Verfahren zum Adaptieren eines Hörgeräts an mindestens eine räumliche Richtung des Schalleinfalls.The present invention relates to a hearing device which is adaptable to the spatial direction of an incoming sound signal, comprising a plurality of microphones for receiving input signals and a computing device for calculating at least one direction from which a predeterminable sound signal arrives. Moreover, the present invention relates to a corresponding method for adapting a hearing device to at least one spatial direction of the sound incidence.

Mit den bekannten Methoden zur"blinden Quellentrennung" (blind source separation, BSS) können mehrere, gleichzeitig sprechende, räumlich verteilte Sprecher getrennt und einer davon zur Verbesserung seiner Verständlichkeit hervorgehoben werden. Die BSS, mit der aus einer Signalmischung die vom Hörgeräteträger gewünschte Nutzschallquelle hervorgehoben werden kann, ist in dem Dokument EP 1 017 253 A2 näher beschrieben. Diese oder ähnliche Methoden benötigen jedoch eine Adaptionszeit von mehreren Sekunden, bis die Richtungen der Sprecher zuverlässig geschätzt sind. Auf Grund von unvermeidbaren Kopfbewegungen, die jedes Mal eine erneute Adaption bedingen, sind diese Algorithmen deshalb derzeit für Hörgeräte nur bedingt geeignet.With the known methods for "blind source separation" (BSS), several, simultaneously speaking, spatially distributed speakers can be separated and one of them can be emphasized to improve its comprehensibility. The BSS with which the useful sound source desired by the hearing device wearer can be highlighted from a signal mixture is in the document EP 1 017 253 A2 described in more detail. However, these or similar methods require an adaptation time of several seconds until the directions of the speakers are reliably estimated. Because of unavoidable head movements, which require re-adaptation each time, these algorithms are therefore currently only of limited use for hearing aids.

Aus der Druckschrift DE 101 48 006 A1 ist eine tragbare Schallwiedergabeeinriehtung zur Erzeugung eines dreidimensionalen Höreindrucks bekannt. Zur Erfassung von Bewegung und Orientierung eines Kopfes wird in einer tragbaren Schallwiedergabeeinrichtung, insbesondere Kopfhörer oder Helm mit integrierten Schallgebern, eine Einrichtung zur Kopforientierungsbestimmung integriert. Damit folgen die virtuellen Schallwellen den Kopfbewegungen des Hörers nicht und die künstlich hervorgerufene dreidimensionale Schallwahrnehmung entspricht der natürlichen Schallwahrnehmung bei realen ortsfesten Schallquellen.From the publication DE 101 48 006 A1 For example, a portable sound reproduction device for generating a three-dimensional sound impression is known. For detecting movement and orientation of a head, a device for determining the head orientation is integrated in a portable sound reproduction device, in particular headphones or a helmet with integrated sound generators. Thus, the virtual sound waves do not follow the head movements of the listener and the artificially induced three-dimensional sound perception corresponds to the natural sound perception in real stationary sound sources.

Weiterhin beschreibt die Druckschrift WO 99/43185 A ein binaurales digitales Hörhilfesystem. Die dabei verwendeten Hörgeräte weisen jeweils eine Übertragungseinrichtung zur drahtlosen Übertragung auf.Furthermore, the document describes WO 99/43185 A a binaural digital hearing aid system. The hearing aids used in this case each have a transmission device for wireless transmission.

Die Aufgabe der vorliegenden Erfindung besteht somit darin, eine Quellentrennung trotz Kopfbewegungen in einem vertretbaren Zeitrahmen in Hörgeräten durchführen zu können.The object of the present invention is therefore to be able to perform source separation despite head movements in a reasonable time frame in hearing aids.

Erfindungsgemäß wird diese Aufgabe durch ein Hörgerät nach Anspruch 1 gelöst.According to the invention this object is achieved by a hearing aid according to claim 1.

Darüber hinaus ist erfindungsgemäß ein Verfahren nach Anspruch 4 vorgesehen.In addition, a method according to claim 4 is provided according to the invention.

Durch die Vermeidung eines erneuten Adaptionsprozesses nach einer Kopfbewegung kann die blinde Quellentrennung auch in Hörgeräten genutzt werden, wodurch in bestimmten Situationen die Sprachverständlichkeit drastisch erhöht werden kann.By avoiding a new adaptation process after a head movement, the blind source separation can also be used in hearing aids, which can be increased dramatically in certain situations, the speech intelligibility.

Vorzugsweise besitzt das Hörgerät bei binauraler Versorgung eine Übertragungseinrichtung zum drahtlosen Übertragen der Kopfposition an das zweite Hörgerät. Damit genügt es, wenn ein Hörgerät mit einer Positionsbestimmungseinrichtung zur Bestimmung der Kopfposition ausgestattet ist. Die Übertragungseinrichtung ist in vielen Fällen bei binauraler Versorgung ohnehin im Hörgerät vorgesehen.In the case of a binaural supply, the hearing device preferably has a transmission device for the wireless transmission of the head position to the second hearing device. Thus, it is sufficient if a hearing device is equipped with a position-determining device for determining the head position. The transmission device is provided in many cases with binaural supply anyway in the hearing aid.

Die Positionsbestimmungseinrichtung kann so gestaltet sein, dass die Position des Kopfes anhand des Erdmagnetfeldes ermittelt wird. Dies hat den Vorteil, dass nicht nur eine relative sondern auch eine absolute Position des Kopfes bestimmt werden könnte.The position determining device can be designed so that the position of the head is determined based on the geomagnetic field. This has the advantage that not only a relative but also an absolute position of the head could be determined.

Alternativ kann die Positionsbestimmungseinrichtung so ausgestaltet sein, dass die Kopfposition mit Hilfe eines Beschleunigungssensors ermittelt wird. Dies hat den Vorteil, dass eine gängige Technologie mit robusten Bauelementen verwendet werden kann.Alternatively, the position-determining device can be configured such that the head position is determined with the aid of an acceleration sensor. This has the advantage that a common technology with robust components can be used.

Bei einer einfachen Ausgestaltung der Erfindung wird eine Kopfbewegung im adaptierten Zustand des Hörgeräts berücksichtigt. Bei einer Weiterentwicklung wird die aktuelle Kopfposition bereits während des Adaptionsprozesses im Hörgerät mit berücksichtigt. Dadurch kann die Zeit zur Einstellung des Hörgeräts weiter reduziert werden.In a simple embodiment of the invention, a head movement in the adapted state of the hearing aid is taken into account. In a further development, the current head position is already taken into account during the adaptation process in the hearing device. As a result, the time for adjusting the hearing device can be further reduced.

Die vorliegende Erfindung wird nun anhand der beigefügten Zeichnung näher erläutert, die ein Blockschaltbild eines erfindungsgemäßen Hörgeräts zeigt.The present invention will now be explained in more detail with reference to the accompanying drawing, which shows a block diagram of a hearing aid according to the invention.

Das nachfolgende näher beschriebene Ausführungsbeispiel stellt eine bevorzugte Ausführungsform der vorliegenden Erfindung dar.The following embodiment described in more detail represents a preferred embodiment of the present invention.

Ein Hörgerät gemäß der Darstellung in der Zeichnung verfügt über mehrere Mikrofone M1, Mn. Die Signale der Mikrofone werden von einer Vorverarbeitungseinheit VV aufgenommen. Eine Positionsbestimmungseinheit PB liefert die aktuelle Kopfposition ebenfalls an die Vorverarbeitungseinheit VV. Die vorverarbeiteten Signale der Vorverarbeitungseinheit VV werden parallel an eine adaptive Verarbeitungs- und Entmischeinheit VE weitergeleitet. Als Resultat liefert die Einheit VE die Signale der verschiedenen Quellen Q1, Qk. Alternativ oder zusätzlich kann die Kopfposition von der Positionsbestimmungseinheit PB auch an die Verarbeitungs- und Entmischeinheit VE geliefert werden.A hearing aid as shown in the drawing has a plurality of microphones M1, Mn. The signals of the microphones are recorded by a preprocessing unit VV. A position determination unit PB also supplies the current head position to the preprocessing unit VV. The preprocessed signals of preprocessing unit VV are sent in parallel to an adaptive processing and demixing unit VE forwarded. As a result, the unit VE supplies the signals of the various sources Q1, Qk. Alternatively or additionally, the head position of the position determination unit PB can also be supplied to the processing and demixing unit VE.

Als Positionsbestimmungseinrichtung PB sind sogenannte "Head Tracker", die beispielsweise das Erdmagnetfeld zur Positionsbestimmung nutzen, kommerziell erhältlich. Im Einsatzfall gibt der Head Tracker ständig die aktuelle Kopfposition an die Vorverarbeitungseinheit VV weiter. Vorzugsweise wird bei binauraler Versorgung diese Information drahtlos auch an das Hörgerät an der anderen Kopfseite übertragen.As a position determining device PB so-called "head trackers", for example, use the earth's magnetic field for position determination, commercially available. In the case of use, the head tracker constantly passes on the current head position to the preprocessing unit VV. In the case of binaural supply, this information is preferably also transmitted wirelessly to the hearing device on the other side of the head.

In der Vorverarbeitungseinheit VV wird die aktuelle Position mit den Mikrofonsignalen derart verrechnet, dass im Falle einer Kopfbewegung die Richtungsänderung der Mikrofone auf Grund der Kopfbewegung so berücksichtigt wird, dass keine neue Adaption durchgeführt werden muss, solange die externen Sprecher bzw. Schallquellen ihre Positionen nicht ändern. Falls die Kopfbewegung bereits während der Adaption stattfindet, muss die Kopfbewegung entsprechend zeitlich registriert werden. In diesem Fall ist beim Adaptionsvorgang die Zeitabhängigkeit der Signale zu berücksichtigen.In the preprocessing unit VV, the current position is offset with the microphone signals such that in the case of a head movement, the change in direction of the microphones due to the head movement is considered so that no new adaptation must be performed as long as the external speakers or sound sources do not change their positions , If the head movement already takes place during the adaptation, the head movement must be registered accordingly. In this case, the adaptation process must take into account the time dependency of the signals.

Claims (6)

  1. Hearing aid, which can be adapted to the spatial direction of an incoming acoustic signal, having
    - a plurality of microphones (M1, Mn) for recording input signals and
    - a computing device (VV, VE) for calculating at least one direction from which a predefined acoustic signal comes in, based on the input signals,
    characterised by
    - a position determining device (PB) for determining the current position of the head of the hearing aid wearer, so that the position of the head is taken into consideration in the computing device (VV, VE) for calculating the at least one direction, whereby
    - the position of the head can be determined based on the earth's magnetic field, by means of the position determining device (PB), or
    - the position determining device (PB) has an acceleration sensor for determining the position of the head.
  2. Hearing aid according to claim 1, having a transmission device for wireless transmission of the head position to a further hearing aid with binaural supply.
  3. Hearing aid according to one of the preceding claims, whereby an up-to-date head position can also be taken into consideration during an adaptation phase, wherein the hearing aid adapts to the at least one direction of the acoustic incidence.
  4. Method for adapting a hearing aid to at least one spatial direction of an acoustic signal arriving at the hearing aid by
    - recording a plurality of microphone input signals and
    - calculating the at least one direction from which a predefined acoustic signal comes in, based on the microphone input signals
    characterised by
    - determining the current position of the head of the hearing aid wearer and
    - considering the current position of the head whilst calculating the at least one current direction from which the acoustic signal comes in, whereby
    - the position of the head is determined on the basis of the earth's magnetic field, or
    - the position of the head is determined with the aid of an acceleration sensor.
  5. Method according to claim 4, whereby the head position is transmitted wirelessly to a further hearing aid, in the case of binaural supply
  6. Method according to claim 4 or 5, whereby an up- to-date head position is also taken into account during an adaptation phase, wherein the hearing aid is adapted to the at least one direction of the acoustic incidence.
EP04024545.8A 2003-11-05 2004-10-14 Method for adapting a hearing aid considering the position of head and corresponding hearing aid Expired - Lifetime EP1530402B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10351509 2003-11-05
DE10351509.7A DE10351509B4 (en) 2003-11-05 2003-11-05 Hearing aid and method for adapting a hearing aid taking into account the head position

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EP1530402A2 EP1530402A2 (en) 2005-05-11
EP1530402A3 EP1530402A3 (en) 2007-10-17
EP1530402B1 EP1530402B1 (en) 2009-07-01
EP1530402B2 true EP1530402B2 (en) 2016-08-24

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US (1) US7295676B2 (en)
EP (1) EP1530402B2 (en)
AT (1) ATE435571T1 (en)
DE (2) DE10351509B4 (en)
DK (1) DK1530402T4 (en)

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Publication number Publication date
DK1530402T3 (en) 2009-10-12
US7295676B2 (en) 2007-11-13
US20050094834A1 (en) 2005-05-05
DE10351509B4 (en) 2015-01-08
ATE435571T1 (en) 2009-07-15
DE10351509A1 (en) 2005-06-09
DE502004009686D1 (en) 2009-08-13
DK1530402T4 (en) 2016-12-19
EP1530402A2 (en) 2005-05-11
EP1530402A3 (en) 2007-10-17
EP1530402B1 (en) 2009-07-01

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