EP2120484B1 - Procédé destiné au fonctionnement d'un appareil auditif et appareil auditif - Google Patents

Procédé destiné au fonctionnement d'un appareil auditif et appareil auditif Download PDF

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Publication number
EP2120484B1
EP2120484B1 EP09155859.3A EP09155859A EP2120484B1 EP 2120484 B1 EP2120484 B1 EP 2120484B1 EP 09155859 A EP09155859 A EP 09155859A EP 2120484 B1 EP2120484 B1 EP 2120484B1
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EP
European Patent Office
Prior art keywords
hearing aid
prescribable
association
acoustic
acoustic signal
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EP09155859.3A
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German (de)
English (en)
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EP2120484A3 (fr
EP2120484A2 (fr
Inventor
Ulrich Kornagel
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Sivantos Pte Ltd
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Sivantos Pte Ltd
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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
    • H04R25/40—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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/41—Detection or adaptation of hearing aid parameters or programs to listening situation, e.g. pub, forest
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
    • 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
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers

Definitions

  • the invention relates to a specified in claim 1 method for operating a hearing aid and a specified in claim 6 hearing aid.
  • noise or unwanted acoustic signals are omnipresent. These interfere with the human voice of a person or with a desired acoustic signal.
  • Hearing aid carriers are particularly susceptible to noise and unwanted acoustic signals. Talking in the background, audible interference with electronic devices such as cell phones, and ambient noise or sounds may make it difficult for a person with a hearing aid to understand a desired speaker. Reducing the level of noise in an acoustic signal coupled with an automatic focus on a desired acoustic signal component can significantly improve the performance of a digital speech processor as used in modern hearing aids.
  • Hearing aids with digital signal processing include one or more microphones, A / D converters, digital signal processors and speakers.
  • digital signal processors divide the incoming signals into a plurality of frequency bands. Within each band, signal amplification and processing may be individually adjusted in accordance with the requirements of a particular wearer of the hearing aid.
  • algorithms for feedback and noise minimization are available in digital signal processing, but they also have disadvantages.
  • a disadvantage of the currently existing algorithms for noise minimization is, for example, their limited improvement in hearing aid acoustics when speech and background noise are in the same frequency region and they are therefore unable to distinguish between spoken language and background noise.
  • BSS Blind Source Separation
  • the directional microphone control in the sense of a BSS is subject to ambiguity as soon as several competing sources of use, eg. B. speaker, present simultaneously.
  • the BSS allowed in principle, the separation of the different sources, if they are spatially separated.
  • the ambiguity reduces the potential benefit of a directional microphone, although it is precisely in such scenarios that a directional microphone can be very useful for improving speech intelligibility.
  • the hearing aid or the mathematical algorithms for BSS are in principle faced with the problem of having to decide which of the signals generated by the BSS should be passed on most advantageously to the hearing aid wearer. This is a problem that in principle is impossible for the hearing aid since the selection of the desired acoustic source directly depends on the momentary will of the hearing aid wearer and thus can not be present as an input variable for a selection algorithm. The choice made by this algorithm must therefore be based on assumptions about the probable will of the listener.
  • EP 1 912 472 A1 a method for operating a hearing aid and a hearing aid is known. From a recorded ambient sound electrical acoustic signals are generated from which a signal processing an electrical voice signal with a high probability of speech is identified and selected. The electrical speech signal is selectively taken into account in an output sound of the hearing aid so that it at least emerges acoustically for the hearing aid wearer in comparison with another acoustic source and is thus better perceived by the hearing aid wearer.
  • EP 1 912 474 A1 discloses a method for operating a hearing aid and a hearing aid. From a recorded ambient sound electrical acoustic signals are generated, from which by signal processing, an electrical speaker signal is identified and selected by a database with voice profiles preferred speakers. The electrical speaker signal is selectively taken into account in an output sound of the hearing aid so that it at least emerges acoustically for the hearing aid wearer in comparison with another acoustic source and is thus better perceived by the hearing aid wearer.
  • the stated object is achieved by the method of independent claim 1 and the hearing aid of independent claim 6.
  • the invention comprises a method for operating a hearing device, wherein electrical acoustic signals are generated by the hearing device from a recorded ambient sound. These are weighted according to their degree of membership to a predeterminable acoustic signal class and mixed together to form an output sound signal. The weight of the acoustic signal is greater or smaller, the higher the degree of membership.
  • the advantage of this is that a hearing aid user a desired signal from a variety of ambient sound signals can be presented.
  • the degree of membership can be determined by the characteristics volume, frequency range, basic speech frequency, cepstral coefficients and / or temporal course of the acoustic signals. This achieves high flexibility.
  • the predeterminable acoustic signal class may include the classes voice or human voice, in a predeterminable frequency band, male voice, female voice, child's voice, voice of a predefinable person, music and ambient noise. This offers the advantage of a wide choice for a hearing device user.
  • the predeterminable acoustic signal class may also comprise any combination of the classes.
  • the electrical acoustic signals are generated from the ambient sound by means of a blind-source separation method. This results in a good sound signal separation.
  • the degree of membership is determined by a feature analysis of the electrical acoustic signals, wherein a probability of belonging to a predeterminable acoustic signal class is determined for the electrical acoustic signals.
  • the advantage of this is the simple mathematical weighting.
  • a hearing aid is also provided with at least one microphone for recording ambient sound and with a demixing unit for generating electrical acoustic signals from the recorded ambient sound.
  • the hearing device comprises a signal processing unit, by the acoustic signals which are weighted according to their degree of membership to a predetermined acoustic signal class and mixed together to form an output sound signal, wherein the weight of the acoustic signal is greater or smaller, the higher the degree of affiliation. This makes it possible to switch between acoustic signal classes "soft".
  • the demixing unit may comprise a blind-source separation module.
  • the signal processing unit may comprise at least one classification module, at least one weight determination module, at least one multiplier and at least one adder.
  • the hearing device can comprise an acoustic signal class input unit with which the desired, specifiable acoustic signal class is transmitted to the hearing aid. This can be arranged on the hearing aid or in a remote control.
  • the FIG. 1 shows the state of the art of a hearing aid 1 with three microphones 2 and a demixing unit 5 according to the blind source separation method.
  • Three signal sources generate three ambient acoustic sound signals s1, s2, s3, which are received by the three microphones 2 and converted into electrical microphone signals X1, X2, X3.
  • the three microphone signals x1, x2, x3 are each supplied to a signal input of the demixing unit 5.
  • the blind-source separation process takes place with the aid of which the ambient sound signals s1, s2, s3 can be reconstructed from the mixed electrical microphone signals x1, x2, x3.
  • a hearing device user can now select between the three separately reproduced acoustic signals s1 ', s2', s3 'by means of a selection switch 7 in a post-processor module 6.
  • the electrical acoustic signal s2 ' was selected and passed on to a handset 3.
  • the demixing unit 5 and the post-processor module form a signal processing unit 4.
  • the listener 3 sends as an acoustic output signal s2 '', which corresponds approximately to the ambient acoustic signal s2.
  • acoustic output signal s2 '' which corresponds approximately to the ambient acoustic signal s2.
  • a hearing aid user does not always want such a hard switching between different input signal sources.
  • FIG. 2 shows a hearing aid 1 with three microphones 2, a signal processing unit 4 and a receiver or loudspeaker 3.
  • Three ambient sound signals s1, s2, s3 are received by the microphones 2 and forwarded as microphone signals x1, x2, x3 to the signal processing unit 4.
  • the processed by the signal processing unit 4 microphone signals x1, x2, x3 are then forwarded to an input of the handset 3 and presented as an acoustic output sound signal s the hearing device user.
  • the microphone signals x1, x2, x3 are processed with the aid of a demixing unit 5 and passed as demixed electrical acoustic signals s1 ', s2', s3 'to the further processing units.
  • a hearing device user can specify a preferred acoustic signal class. This specification is passed to the classification module 8 and processed in this.
  • the preselected acoustic signal class may include, for example, a male voice, a female voice, a child's voice or even a certain frequency range, or generally human voice, or music, etc.
  • the classification module 8 calculates the probability with which an electrical acoustic signal s1 ', s2', s3 'belongs to a specific acoustic signal class. With the help of a weight determination module 9, this degree of affiliation is now weighted accordingly. For this purpose, the degrees of membership of the classified signals are routed from outputs of the classification module 8 to inputs of the weighting module 9.
  • the weight determination module 9 now determines the weights g1, g2, g3 such that the higher the degree of belonging to the preselected class has been determined, the higher the weight of an acoustic signal is selected.
  • the weights g1, g2, g3 are routed to these respective inputs of the multipliers 10.
  • the electrical acoustic signals s1 ', s2', s3 ' are now multiplied by the weights g1, g2, g3.
  • the weighted electrical acoustic signals are passed to an adder 11. In the adder 11, these signals are added and provided to the output of the adder 11. Subsequently, the electrical signal at the output of the adder in the receiver 3 is converted into an output sound signal S.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Claims (8)

  1. Procédé destiné au fonctionnement d'un appareil auditif (1) consistant à générer des signaux acoustiques électriques (s1', s2', s3') au moyen de l'appareil auditif (1) à partir d'un son ambiant reçu (s1, s2, s3) par un procédé de séparation de source aveugle, dans lequel, pour les signaux acoustiques électriques (s1', s2', s3'), une probabilité respective d'appartenance à une classe de signaux acoustiques pouvant être prédéfinie est déterminée par une analyse de caractéristiques des signaux acoustiques électriques (s1', s2', s3') sous la forme d'un degré d'appartenance, et dans lequel les signaux acoustiques électriques (s1', s2', s3') sont pondérés d'une manière qui correspond à leur degré d'appartenance respectif dans la classe de signaux acoustiques pouvant être prédéfinie et sont combinés en un signal sonore de sortie (s), dans lequel le poids respectif (g1, g2, g3) du signal acoustique (s1', s2', s3') est d'autant plus élevé que le degré d'appartenance respectif est élevée.
  2. Procédé selon la revendication 1,
    caractérisé en ce que le degré d'appartenance est déterminé par les caractéristiques suivantes : intensité sonore, gamme de fréquences, fréquence fondamentale, coefficients cepstraux et/ou évolution temporelle des signaux acoustiques (s1', s2', s3').
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que la classe de signaux acoustiques pouvant être prédéfinie comprend les classes suivantes :
    - parole ou voix humaine,
    - le fait de se situer dans une bande de fréquences pouvant être prédéfinie,
    - voix masculine, voix féminine, voix enfantine,
    - voix d'une personne pouvant être prédéfinie,
    - musique et
    - bruit ambiant.
  4. Procédé selon la revendication 3,
    caractérisé en ce que la classe de signaux acoustiques pouvant être prédéfinie comprend une combinaison quelconque desdites classes.
  5. Produit de programme informatique comprenant un programme informatique qui comporte des moyens logiciels destinés à mettre en oeuvre un procédé selon l'une quelconque des revendications 1 à 4 lorsque le programme informatique est exécuté dans une unité de commande.
  6. Appareil auditif (1) comportant au moins un microphone (2) destiné à recevoir un son ambiant (s1, s2, s3) et comportant une unité de séparation (5) destinée à générer des signaux acoustiques électriques (s1', s2', s3') à partir du son ambiant reçu (s1, s2, s3), dans lequel l'unité de séparation (5) comprend un module de séparation de source aveugle et une unité de traitement de signaux (4) au moyen desquels des signaux acoustiques (s1', s2', s3') qui peuvent être pondérés d'une manière qui correspond à leur degré d'appartenance respectif dans une classe de signaux acoustiques pouvant être prédéfinie et peuvent être combinés en un signal sonore de sortie (s), dans lequel le poids respectif (g1, g2, g3) du signal acoustique (s1', s2', s3') est d'autant plus élevé que le degré d'appartenance respectif est élevé, lequel degré d'appartenance peut être déterminé par une analyse de caractéristiques des signaux acoustiques électriques (s1', s2', s3'), dans lequel, pour les signaux acoustiques électriques (s1', s2', s3'), une probabilité d'appartenance à une classe de signaux acoustiques pouvant être prédéfinie peut être déterminée sous la forme d'un degré d'appartenance respectif.
  7. Appareil auditif (1) selon la revendication 6,
    caractérisé en ce que l'unité de traitement de signaux (4) comprend au moins un module de classification (8), au moins un module de pondération (9), au moins un module multiplicateur (10) et au moins un additionneur (11).
  8. Appareil auditif (1) selon la revendication 6 ou 7,
    caractérisé par une unité de fourniture en entrée de classe de signaux acoustiques (12) au moyen de laquelle les classes de signaux acoustiques pouvant être prédéfinies peuvent être transmises à l'appareil auditif (1).
EP09155859.3A 2008-05-13 2009-03-23 Procédé destiné au fonctionnement d'un appareil auditif et appareil auditif Active EP2120484B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008023370A DE102008023370B4 (de) 2008-05-13 2008-05-13 Verfahren zum Betreiben eines Hörgeräts und Hörgerät

Publications (3)

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EP2120484A2 EP2120484A2 (fr) 2009-11-18
EP2120484A3 EP2120484A3 (fr) 2010-05-26
EP2120484B1 true EP2120484B1 (fr) 2016-05-18

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US (1) US8737652B2 (fr)
EP (1) EP2120484B1 (fr)
DE (1) DE102008023370B4 (fr)
DK (1) DK2120484T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2670168A1 (fr) * 2012-06-01 2013-12-04 Starkey Laboratories, Inc. Dispositif d'assistance auditive adaptatif utilisant la détection et la classification d'environnement multiple
JP6216169B2 (ja) * 2012-09-26 2017-10-18 キヤノン株式会社 情報処理装置、情報処理方法
WO2017084397A1 (fr) 2015-11-19 2017-05-26 The Hong Kong University Of Science And Technology Procédé, système, et support de stockage pour une séparation de signaux
WO2019084214A1 (fr) 2017-10-24 2019-05-02 Whisper.Ai, Inc. Séparation et recombinaison audio pour l'intelligibilité et le confort

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1912474A1 (fr) * 2006-10-10 2008-04-16 Siemens Audiologische Technik GmbH Procédé pour le fonctionnement d'une prothèse auditive et prothèse auditive

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
DE19948907A1 (de) * 1999-10-11 2001-02-01 Siemens Audiologische Technik Verfahren zur Signalverarbeitung in einer Hörhilfe sowie Hörhilfe
DE10245567B3 (de) * 2002-09-30 2004-04-01 Siemens Audiologische Technik Gmbh Vorrichtung und Verfahren zum Anpassen eines Hörgeräts
AU2003296976A1 (en) * 2002-12-11 2004-06-30 Softmax, Inc. System and method for speech processing using independent component analysis under stability constraints
EP1489882A3 (fr) * 2003-06-20 2009-07-29 Siemens Audiologische Technik GmbH Procédé pour l'opération d'une prothèse auditive aussi qu'une prothèse auditive avec un système de microphone dans lequel des diagrammes de rayonnement différents sont sélectionnables.
US7957548B2 (en) * 2006-05-16 2011-06-07 Phonak Ag Hearing device with transfer function adjusted according to predetermined acoustic environments
EP1912472A1 (fr) * 2006-10-10 2008-04-16 Siemens Audiologische Technik GmbH Procédé pour le fonctionnement d'une prothèse auditive and prothèse auditive

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1912474A1 (fr) * 2006-10-10 2008-04-16 Siemens Audiologische Technik GmbH Procédé pour le fonctionnement d'une prothèse auditive et prothèse auditive

Also Published As

Publication number Publication date
DK2120484T3 (da) 2016-08-29
DE102008023370B4 (de) 2013-08-01
DE102008023370A1 (de) 2009-11-19
US8737652B2 (en) 2014-05-27
US20090285422A1 (en) 2009-11-19
EP2120484A3 (fr) 2010-05-26
EP2120484A2 (fr) 2009-11-18

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