EP1101390B1 - Appareil auditif permettant une meilleure comprehension de la parole grace a un traitement de signal selectif en frequence, et procede permettant de faire fonctionner un tel appareil auditif - Google Patents

Appareil auditif permettant une meilleure comprehension de la parole grace a un traitement de signal selectif en frequence, et procede permettant de faire fonctionner un tel appareil auditif Download PDF

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Publication number
EP1101390B1
EP1101390B1 EP99934667A EP99934667A EP1101390B1 EP 1101390 B1 EP1101390 B1 EP 1101390B1 EP 99934667 A EP99934667 A EP 99934667A EP 99934667 A EP99934667 A EP 99934667A EP 1101390 B1 EP1101390 B1 EP 1101390B1
Authority
EP
European Patent Office
Prior art keywords
partial signals
signal
partial
hearing aid
speech
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99934667A
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German (de)
English (en)
Other versions
EP1101390A1 (fr
Inventor
Frank Wagner
Fred ZÖLS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
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Application filed by Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1101390A1 publication Critical patent/EP1101390A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • 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
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain
    • 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

Definitions

  • the invention relates to a method for operating a hearing aid with the features of the preamble of the claim 1 and a hearing aid with the features of the preamble of Claim 5.
  • Hearing aids which are wearable on the head are known as prior art, what special hearing programs to suppress Have noise, certain by activating a filter Frequency components are damped. As a result, a Improvement in general noise levels achieved which, however, is not sufficient for many applications.
  • a hearing aid with at least one is known from EP 577 441 A2 Input converter of a signal processing unit and one Output converter.
  • the signal processing unit comprises an A / D converter at the input, several parallel signal channels with one filter, one analysis element and one Adaptation element and at the output a D / A converter.
  • the signal processing unit enables recognition and lifting of speech signals.
  • the signal analysis is based on measurements the amplitude, frequency, duration and frequency changes of a signal.
  • this hearing aid includes a device for measuring the strength of a signal in each individual frequency selection channel and to influence the channels with each other in the sense of suppression from weak signal channels to the advantage of strong ones Signal channels.
  • WO 91/03042 describes a method and a device for distinguishing known from speech and interference signals. Doing so divides the input signal into several band-limited partial signals, each of which has at least two harmonic frequencies of the speech signal contains. It will be the envelopes of the partial signals as well as the synchronism between the envelopes determined. Depending on the value of the determined synchronism the partial signals are further processed.
  • the disadvantage of this method is the high level associated with it Computational effort.
  • a multi-channel hearing aid emerges from US Pat. No. 4,852,175. in which the individual channels independently on the Existence of noise is investigated. Will in one Channel noise is detected, so there is a reduction in Reinforcement for this channel. The level of noise in one Channel is determined based on an amplitude histogram.
  • the invention has for its object a hearing aid, such as a hearing aid that can be worn on the head or an implantable hearing aid as well as a method for operating a hearing aid create an improvement in speech intelligibility in enable a variety of listening situations.
  • a hearing aid such as a hearing aid that can be worn on the head or an implantable hearing aid as well as a method for operating a hearing aid create an improvement in speech intelligibility in enable a variety of listening situations.
  • the task becomes for the procedure for operating a hearing aid by the features of the characterizing part of the claim 1 in conjunction with the features of the preamble solved.
  • Advantageous embodiments of the method are realized by subclaims 2 -8.
  • the task is characterized by the characteristics of the characteristic part of claim 9 solved with the features of the preamble.
  • the hearing aid according to the invention has an analysis element for Detection of speech information in which the filter element of the Hearing aid split partial signals.
  • the filter element of the Hearing aid split partial signals.
  • the mean and the course of the envelope determined. If the level peaks, the amount exceeds of the envelope the amount of the mean.
  • Such one Excess can be used as a criterion for the existence of a Level peak are used, so that this in the analysis of the partial signal the presence of speech information becomes detectable. Thereupon the considered partial signal be raised to face the detected speech information to amplify low-level noise.
  • the split partial signals have the lowest possible frequency range.
  • the analysis element advantageously comprises several analysis programs for the detection of different speech information and speech patterns.
  • an analysis program for the detection of sudden level peaks serve. Such peaks are often speech information, the level of which is the constant and low level Noise exceeds.
  • the hearing aid according to the invention enables any short-term and only occasionally occurring Detect and specifically raise voice information.
  • the control process is ended immediately when from Analysis element determines that no speech information there is more. This avoids that after the voice information re-emerging noise was also raised becomes.
  • an analysis is carried out first for the detection of speech information in the partial signals, by splitting the total signal in a filter element be won.
  • the respective partial signal is raised and thus the Speech intelligibility of the detected speech information improved.
  • Speech information in the partial signals by detection determined from level peaks ("bursts"). When such occurs Level peaks are highly likely to be speech information in front of the low noise level (e.g. background noise).
  • the respective partial signal can be used in further process variants in its signal course with mathematical methods and characteristic values be analyzed in the manner of a curve discussion.
  • the analysis of the partial signals according to the invention can be arbitrary short time intervals take place, even to individual only briefly occurring language elements (e.g. vowels, sibilants, consonants etc.) to be detected and practically with immediate effect and only short settling times to improve the Increase speech intelligibility.
  • a spoken word is just a single letter starting with matches a certain language pattern, especially highlighted while the other letters and syllables transmitted unreinforced or with less gain.
  • the method according to the invention thus enables selective Improve speech intelligibility.
  • Control and regulation jumps within a very short time Settling times ( ⁇ than 2 ms) and switches within equally short decay times if there is no more language is detected.
  • the analysis element 7 the partial signals of the individual channels 11, 11 ', 11 "for the presence of language. If A detection of speech is made over the connection between analysis element 7 and adaptation device 8 the respective Sub-signal 12 raised in the adaptation element 8 (increased), to improve speech intelligibility.
  • the signal processing element 9 are the partially raised partial signals processed (e.g. by AGC circuits). After a Merging of the partial signals 12 and a D / A conversion in D / A converter 10, the overall signal with improved speech intelligibility fed to the listener 3.
  • FIG. 2 is a schematic illustration and shows for reasons clarity, a relatively long lasting level increase.
  • the method according to the invention also enables Detection of short-term level peaks (not shown).
  • the course of the partial signal 12 can now be mathematical Methods and parameters e.g. with those from the curve discussion known methods can be assessed in the analysis element 7. there can have minima, maxima and pole positions as well as first or higher Derivatives are calculated and based on the results.
  • minima, maxima and pole positions as well as first or higher Derivatives are calculated and based on the results.
  • the analysis of the partial signal 12 of the respective channel 11, 11 ', 11 '' serves for the detection of speech, since only when it is present of speech information, the raising of the invention respective partial signal 12 in the considered analysis period should take place in order to avoid that also a noise level is raised.
  • FIG. 2 shows the analysis of the profile of the partial signal 12 in the analysis element 7 the mean 13 and the (schematic shown) envelope 14 of the partial signal 12 is formed.
  • the amount of the envelope 14 increases to the value A, as a result of which the coverage area 15 between the envelope 14 and the mean value 13 increases. It can be assumed that the value A is above a limit value X between the value B and the value A.
  • the increase occurs with the shortest possible settling time of less than 2 ms after t 1 and is ended after t 2 with the shortest possible settling time of likewise less than 2 ms.
  • the method according to the invention thus reacts briefly and spontaneously to the speech information present between the times t 1 and t 2 in the partial signal 12 and raises the partial signal 12 accordingly between the times t 1 and t 2 .
  • the level increase (at t 1) and level drop (at t 2 ) can also follow one another briefly, as a result of which the partial signal 12 can be raised and lowered again practically without delay due to the particularly short settling / decay times (not shown).

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Multimedia (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

L'invention concerne un appareil auditif comportant un micro (1), une unité de traitement de signal (2) et un écouteur (3), ladite unité de traitement de signal (2) étant pourvue d'un élément filtrant (6) servant à la décomposition du signal en plusieurs signaux partiels (12), un élément d'analyse (7), servant à la détection d'informations vocales dans les signaux partiels (12), ainsi qu'un élément d'adaptation (8) servant à accentuer les signaux partiels (12) lorsque des informations vocales sont présentes. L'invention concerne en outre un procédé permettant de faire fonctionner un tel appareil auditif.

Claims (9)

  1. Procédé pour faire fonctionner un appareil auditif comportant un microphone, une unité de traitement de signal et un écouteur, le signal étant décomposé en plusieurs sous-signaux par un élément de filtrage de l'unité de traitement de signal, une information vocale étant détectée dans les sous-signaux par au moins un élément d'analyse (7) et des sous-signaux qui présentent de la parole étant accentués par au moins un élément d'adaptation (8),
       caractérisé par le fait que, lors de l'analyse des sous-signaux, on détermine leurs valeurs moyennes et leurs enveloppantes, on les compare entre elles en valeur absolue et on effectue une accentuation du sous-signal respectif lorsque la valeur absolue de l'enveloppante dépasse la valeur moyenne.
  2. Procédé selon la revendication 2,
       caractérisé par le fait qu'on effectue une accentuation du sous-signal respectif lorsque la valeur absolue de l'enveloppante dépasse d'une valeur minimale réglable la valeur moyenne.
  3. Procédé selon la revendication 1 ou 2,
       caractérisé par le fait que, lors de l'analyse des sous-signaux, on effectue une analyse de la courbe des sous-signaux.
  4. Procédé selon la revendication 3,
       caractérisé par le fait que, lors de l'analyse des sous-signaux, on détermine la dérivée première et des dérivées supérieures.
  5. Procédé selon la revendication 3 ou 4,
       caractérisé par le fait que, lors de l'analyse des sous-signaux, on détermine des caractéristiques des sous-signaux comme les minima, les maxima et les positions polaires.
  6. Procédé selon l'une des revendications 1 à 5,
       caractérisé par le fait que, lors de l'analyse des sous-signaux, on détermine des paramètres comme la profondeur de modulation, la fréquence de modulation et d'autres paramètres auditifs.
  7. Procédé selon l'une des revendications 1 à 6,
       caractérisé par le fait qu'on effectue l'analyse des sous-signaux à des intervalles de temps réglables.
  8. Procédé selon l'une des revendications 1 à 7,
       caractérisé par le fait qu'on effectue l'accentuation des sous-signaux respectifs en des temps de montée et d'évanouissement de 2 ms au maximum.
  9. Appareil auditif avec des moyens pour la mise en oeuvre des étapes de procédé selon l'une des revendications 1 à 8, comportant un microphone, une unité de traitement de signal et un écouteur, l'unité de traitement de signal comportant un élément de filtrage pour la décomposition du signal en plusieurs sous-signaux, au moins un élément d'analyse (7) étant prévu pour la détection d'une information vocale dans les sous-signaux et au moins un élément d'adaptation (8) étant prévu pour l'accentuation des sous-signaux qui présentent de la parole,
       caractérisé par au moins un générateur d'enveloppante pour produire l'enveloppante d'un sous-signal ainsi que par un dispositif de formation de valeur moyenne pour produire la valeur moyenne du sous-signal ainsi que par un élément de comparaison pour comparer l'enveloppante à la valeur moyenne.
EP99934667A 1998-07-24 1999-07-12 Appareil auditif permettant une meilleure comprehension de la parole grace a un traitement de signal selectif en frequence, et procede permettant de faire fonctionner un tel appareil auditif Expired - Lifetime EP1101390B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19833434 1998-07-24
DE19833434 1998-07-24
PCT/EP1999/004884 WO2000005923A1 (fr) 1998-07-24 1999-07-12 Appareil auditif permettant une meilleure comprehension de la parole grace a un traitement de signal selectif en frequence, et procede permettant de faire fonctionner un tel appareil auditif

Publications (2)

Publication Number Publication Date
EP1101390A1 EP1101390A1 (fr) 2001-05-23
EP1101390B1 true EP1101390B1 (fr) 2004-04-14

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EP99934667A Expired - Lifetime EP1101390B1 (fr) 1998-07-24 1999-07-12 Appareil auditif permettant une meilleure comprehension de la parole grace a un traitement de signal selectif en frequence, et procede permettant de faire fonctionner un tel appareil auditif

Country Status (5)

Country Link
US (1) US6768801B1 (fr)
EP (1) EP1101390B1 (fr)
DE (1) DE59909190D1 (fr)
DK (1) DK1101390T3 (fr)
WO (1) WO2000005923A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3048813B1 (fr) 2015-01-22 2018-03-14 Sivantos Pte. Ltd. Procédé et dispositif de suppression du bruit basée sur l'inter-corrélation de bandes secondaires
EP3823306A1 (fr) 2019-11-15 2021-05-19 Sivantos Pte. Ltd. Système auditif comprenant un instrument auditif et procédé de fonctionnement de l'instrument auditif
EP4138416A1 (fr) 2021-08-16 2023-02-22 Sivantos Pte. Ltd. Système auditif comprenant un instrument auditif et procédé de fonctionnement de l'instrument auditif

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DE10228826A1 (de) * 2002-06-27 2004-01-29 Siemens Audiologische Technik Gmbh Akustikmodul für ein Hörhilfsgerät
DK1723827T3 (da) 2004-03-01 2008-07-28 Gn Resound As Höreapparat med automatisk skift mellem funktionstilstande
EP1723829B1 (fr) 2004-03-02 2011-05-04 Oticon A/S Procédé de réduction du bruit dans un dispositif audio et aide auditive equipée d'un moyen de réduction du bruit
EP2165327A4 (fr) * 2007-06-15 2013-01-16 Cochlear Ltd Sélection d'entrée pour dispositifs auditifs
EP2232700B1 (fr) 2007-12-21 2014-08-13 Dts Llc Système pour ajuster la sonie perçue de signaux audio
WO2008084116A2 (fr) * 2008-03-27 2008-07-17 Phonak Ag Procédé pour faire fonctionner une prothèse auditive
US8538042B2 (en) 2009-08-11 2013-09-17 Dts Llc System for increasing perceived loudness of speakers
DE102011006511B4 (de) 2011-03-31 2016-07-14 Sivantos Pte. Ltd. Hörhilfegerät sowie Verfahren zum Betrieb eines Hörhilfegeräts
WO2013019562A2 (fr) * 2011-07-29 2013-02-07 Dts Llc. Processeur d'intelligibilité de voix adaptatif
US9312829B2 (en) 2012-04-12 2016-04-12 Dts Llc System for adjusting loudness of audio signals in real time
US20140185850A1 (en) * 2013-01-02 2014-07-03 Starkey Laboratories, Inc. Method and apparatus for tonal enhancement in hearing aid
CN113470691A (zh) * 2021-07-08 2021-10-01 浙江大华技术股份有限公司 一种语音信号的自动增益控制方法及其相关装置

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3048813B1 (fr) 2015-01-22 2018-03-14 Sivantos Pte. Ltd. Procédé et dispositif de suppression du bruit basée sur l'inter-corrélation de bandes secondaires
EP3823306A1 (fr) 2019-11-15 2021-05-19 Sivantos Pte. Ltd. Système auditif comprenant un instrument auditif et procédé de fonctionnement de l'instrument auditif
US11510018B2 (en) 2019-11-15 2022-11-22 Sivantos Pte. Ltd. Hearing system containing a hearing instrument and a method for operating the hearing instrument
EP4138416A1 (fr) 2021-08-16 2023-02-22 Sivantos Pte. Ltd. Système auditif comprenant un instrument auditif et procédé de fonctionnement de l'instrument auditif

Also Published As

Publication number Publication date
WO2000005923A1 (fr) 2000-02-03
US6768801B1 (en) 2004-07-27
DE59909190D1 (de) 2004-05-19
DK1101390T3 (da) 2004-08-02
EP1101390A1 (fr) 2001-05-23

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