EP1192838A2 - Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese - Google Patents

Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese

Info

Publication number
EP1192838A2
EP1192838A2 EP00927233A EP00927233A EP1192838A2 EP 1192838 A2 EP1192838 A2 EP 1192838A2 EP 00927233 A EP00927233 A EP 00927233A EP 00927233 A EP00927233 A EP 00927233A EP 1192838 A2 EP1192838 A2 EP 1192838A2
Authority
EP
European Patent Office
Prior art keywords
hearing aid
microphone
directional microphone
order
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00927233A
Other languages
German (de)
English (en)
Other versions
EP1192838B1 (fr
EP1192838B2 (fr
Inventor
Benno Knapp
Hartmut Ritter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7910100&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1192838(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Publication of EP1192838A2 publication Critical patent/EP1192838A2/fr
Publication of EP1192838B1 publication Critical patent/EP1192838B1/fr
Application granted granted Critical
Publication of EP1192838B2 publication Critical patent/EP1192838B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—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
    • 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 hearing aid with the features of the preamble of claim 1. Furthermore, the invention relates to a method for operating a hearing aid.
  • Hearing aid devices with at least two microphones for achieving directional microphone characteristics of first or higher order are known as prior art.
  • second-order or higher-order directional microphone systems are used, an undesired reduction in the directivity index (directional index) occurs in individual frequency ranges of the input signal.
  • the frequency range from 100 Hz to 6 kHz is particularly interesting for improving hearing.
  • a directivity index that falls slightly towards higher frequencies is obtained over this frequency range.
  • Di values of about 5 dB are obtained.
  • Directional microphone systems of the n-th order with n> l have a negative directivity index due to the high sensitivity to component tolerances at low frequencies.
  • DI values of 7 dB and more can be achieved for frequencies from 1 kHz to 5 kHz.
  • a hearing aid is known from US Pat. No. 5,757,933 in which it is possible to switch manually between a zero-order microphone (microphone without directional effect) and a first-order microphone system. The switch is made by the hearing aid wearer.
  • the invention has for its object to provide a hearing aid and a method for operating a hearing aid, in which a high directivity index is achieved over a wide frequency range of the input signal.
  • the hearing aid according to the invention comprises at least two microphones in order to be able to implement directional microphone systems of zero, first or higher order.
  • a zero-directional microphone system in the sense of the invention is to be understood as a microphone system without directional effect, for example an omnidirectional microphone that is not connected to other microphones.
  • first-order directional microphone systems is a theoretically achievable maximum value of the directivity index
  • DI DI of 6 dB (hypermere).
  • KEMAR a standard research manikin
  • Directional microphone systems of the second and higher order have Di values of 10 dB and more, which are advantageous, for example, for better speech intelligibility.
  • a hearing aid contains, for example, three omnidirectional microphones
  • directional microphone systems of zero to second order can be formed on this basis. Microphone signals can thus be simultaneously received from these directional microphone systems with zero to second order polar patterns.
  • the microphone signals emanating from microphone systems of different orders are weighted and summed differently depending on the frequency.
  • a hearing aid with directional microphone systems of first and second order essentially the first order microphone signal is further processed at low frequencies and the second order microphone signal is processed at higher frequencies.
  • the weighting is preferably carried out by filter elements, the microphone signal of the first-order directional microphone system being subjected to low-pass filtering and the microphone signal of the second-order directional microphone system being subjected to high-pass filtering.
  • the microphone signal of the directional microphone of the first order is passed on at low frequencies and the microphone signal of the directional microphone system of the nth order is passed on for further processing, where n stands for the highest occurring order.
  • essentially the microphone signals of the directional microphone systems between the first and the highest occurring order are preferably processed further.
  • the cut-off frequencies of the filter elements connected downstream of the directional microphone systems are adjustable.
  • the limit frequencies in the audible frequency range for example up to 10 kHz
  • the associated frequency-dependent selection of directional microphone systems of different orders directional properties can be achieved for the overall system, which are clearly superior to conventional hearing aids, viewed over the entire frequency range.
  • An optimized directional effect can thus be achieved for each frequency of the input signal.
  • Modern hearing aids allow the acoustic input signal to be divided into channels. Among other things, this enables different amplification of individual frequency ranges.
  • the cutoff frequencies of the filter elements downstream of the directional microphone systems are coupled to cutoff cutoff frequencies of the hearing aid.
  • each directional microphone system forms a channel.
  • the filter elements for weighting the microphone signals then simultaneously effect the channel division, which means that additional filter elements for channel division can be omitted.
  • the position of one or more cut-off frequencies can also be determined according to the situation and continuously checked and adjusted. This results in an optimized adaptation to different usable / noise situations.
  • the environmental situation is preferably analyzed by means of a neural network and / or a fuzzy logic controller.
  • the setting of the cut-off frequencies and the overall directional characteristic of the microphone system of a hearing aid according to the invention can also be carried out differently depending on the hearing program set.
  • a zero-order microphone signal microphone signal with no directional effect
  • FIG. 1 shows a basic circuit diagram for the generation and frequency-dependent combination of directional microphone systems of different orders
  • Figure 2 is a schematic diagram of a hearing aid with three microphones
  • Figure 3 shows a frequency-specific curve of the directivity index (DI).
  • the microphones of a hearing aid are labeled MIK1, MIK2, ...., MIKm.
  • the electronic circuit arrangement ES for forming directional microphone systems can include electronic components such as delay elements, summation elements or inverters.
  • the directional microphone signals thus formed at the output of the electronic circuit ES are referred to as zero-order directional microphone signal RSO, first-order directional microphone signal RS1,..., N-order directional microphone signal RSn.
  • Several directional microphone signals of the same order can also be formed. In the hearing aid according to the invention, however, at least two directional microphone signals differ in terms of their order.
  • the filter bank FB has filter elements, for example high-pass, low-pass or bandpass filters.
  • the directional microphone signals are attenuated differently by the filter bank FB depending on their order and their signal frequency.
  • the cut-off frequencies and filter coefficients of the individual filter elements can preferably be set.
  • the output signals (AS0, AS1 ... ASn) of the filter bank FB are fed to a summation element S in order to form the overall microphone microphone signal GRS.
  • the principle circuit diagram shown for processing the microphone signals of a hearing aid can be implemented both in digital and in analog circuitry. There can also be other elements Components such as A / D converters, D / A converters, switches, amplifiers, etc. (not shown here).
  • the circuit will be set in such a way that the first-order directional microphone signal is transmitted at least essentially up to a lower limit frequency fgl, for example 1 kHz.
  • fgl a lower limit frequency
  • the directional microphone signal of the first order is increasingly mixed with directional microphone signals of a higher order and possibly the directional microphone signals are even attenuated.
  • FIG. 2 shows an exemplary embodiment of a hearing aid with three microphones 1, 2 and 3.
  • a signal line 11 there is a signal of a first order system with the directional microphone characteristic “undelayed eight” when the input signals of the microphones 1, 2 follow Inversion in the inverter 4 can be added via the sum element 7.
  • a signal with the directional microphone characteristic "delayed eight" of a first-order directional microphone system is present in the signal line 13 when the signals of the microphones 2 and 3 are added in the sum element 8 after inverting the signal of the microphone 3 in the inverter 5 and subsequently inverted in the inverter 6 and delayed in the delay element 10.
  • the microphone pairs 1, 2 and 2, 3 thus each form a first-order directional microphone system due to the circuitry shown.
  • the mentioned signals of the directional microphone systems of the first order are processed in a signal processing unit 14 (channel-specific zifisch) processed and supplied as an output signal to the speaker 16.
  • the circuit diagram according to FIG. 2 also allows a. To be implemented by suitably interconnecting all three microphones
  • Directional microphone system of the second order in that the signals of the signal lines 11, 13 are combined in the sum element 9 to form the signal line 12.
  • the signal processing unit 14 comprises a filter element
  • the signal processing unit 14 can essentially further process the signals in the signal lines 11 or 13. If the signal frequency exceeds the limit frequency fg, the filter element 17 essentially further processes the signal of the signal line 12, and thus a signal of a second-order directional microphone system.
  • the signal lines 11 and 13 in the filter element 17 are connected to low-pass filters, while the signal line 12 is fed to a high-pass filter.
  • the filtered signals are summed (not shown).
  • DI directivity index
  • neural networks and fuzzy logic controls can be present to control the respective Limit frequencies fg to be determined again and again in accordance with the situation by signal-analytical assessment of the useful / storage noise and, if necessary, continuously adapted.

Landscapes

  • 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)

Abstract

Prothèse auditive qui est dotée d'une unité de traitement (14) de signaux et d'au moins deux microphones (1, 2, 3) qui peuvent être couplés ensemble pour la formation de systèmes de microphone directionnel d'ordre différent, des signaux (11, 12, 13) de microphone sortant de systèmes de microphone directionnel d'ordre différent pouvant être couplés selon une pondération dépendant de la fréquence des signaux de microphone. La présente invention concerne en outre un procédé permettant de faire fonctionner une prothèse auditive de ce type.
EP00927233.7A 1999-06-02 2000-05-22 Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese Expired - Lifetime EP1192838B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19925392 1999-06-02
DE19925392 1999-06-02
PCT/EP2000/004648 WO2000076268A2 (fr) 1999-06-02 2000-05-22 Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese

Publications (3)

Publication Number Publication Date
EP1192838A2 true EP1192838A2 (fr) 2002-04-03
EP1192838B1 EP1192838B1 (fr) 2003-08-06
EP1192838B2 EP1192838B2 (fr) 2013-09-04

Family

ID=7910100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00927233.7A Expired - Lifetime EP1192838B2 (fr) 1999-06-02 2000-05-22 Prothese auditive a systeme de microphone directionnel et procede permettant de faire fonctionner ladite prothese

Country Status (5)

Country Link
US (2) US7324649B1 (fr)
EP (1) EP1192838B2 (fr)
DE (1) DE50003206D1 (fr)
DK (1) DK1192838T4 (fr)
WO (1) WO2000076268A2 (fr)

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US7050876B1 (en) 2000-10-06 2006-05-23 Phonak Ltd. Manufacturing methods and systems for rapid production of hearing-aid shells
DE10310579B4 (de) 2003-03-11 2005-06-16 Siemens Audiologische Technik Gmbh Automatischer Mikrofonabgleich bei einem Richtmikrofonsystem mit wenigstens drei Mikrofonen
DE10327890A1 (de) * 2003-06-20 2005-01-20 Siemens Audiologische Technik Gmbh Verfahren zum Betrieb eines Hörhilfegerätes sowie Hörhilfegerät mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteristiken einstellbar sind
DE10327889B3 (de) * 2003-06-20 2004-09-16 Siemens Audiologische Technik Gmbh Verfahren zum Betrieb eines Hörhilfegerätes sowie Hörhilfegerät mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteristiken einstellbar sind und Programmiergerät dafür
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.
DE602004005234T2 (de) * 2003-07-07 2007-11-08 Koninklijke Philips Electronics N.V. System und verfahren zur signalverarbeitung
DE10331956C5 (de) 2003-07-16 2010-11-18 Siemens Audiologische Technik Gmbh Hörhilfegerät sowie Verfahren zum Betrieb eines Hörhilfegerätes mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteistiken einstellbar sind
DE10334396B3 (de) * 2003-07-28 2004-10-21 Siemens Audiologische Technik Gmbh Hörhilfegerät sowie Verfahren zum Betrieb eines Hörhilfegerätes mit einem Mikrofonsystem, bei dem unterschiedliche Richtcharakteristiken einstellbar sind
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DK1695590T3 (da) * 2003-12-01 2014-06-02 Wolfson Dynamic Hearing Pty Ltd Fremgangsmåde og apparat til fremstilling af adaptive, retningsbestemte signaler
EP1699261B1 (fr) * 2005-03-01 2011-05-25 Oticon A/S Système et procédé pour déterminer la directionalité du son avec une prothèse auditive
US7697827B2 (en) 2005-10-17 2010-04-13 Konicek Jeffrey C User-friendlier interfaces for a camera
US7936890B2 (en) 2006-03-28 2011-05-03 Oticon A/S System and method for generating auditory spatial cues
EP1841281B1 (fr) * 2006-03-28 2015-07-29 Oticon A/S Système et procédé pour générer des marqueurs auditifs spatiaux
WO2008071236A2 (fr) 2006-12-15 2008-06-19 Phonak Ag Système auditif à suppression de bruit améliorée
JP4367484B2 (ja) 2006-12-25 2009-11-18 ソニー株式会社 音声信号処理装置、音声信号処理方法及び撮像装置
US8107654B2 (en) * 2008-05-21 2012-01-31 Starkey Laboratories, Inc Mixing of in-the-ear microphone and outside-the-ear microphone signals to enhance spatial perception
DE102008049086B4 (de) * 2008-09-26 2011-12-15 Siemens Medical Instruments Pte. Ltd. Hörhilfegerät mit einem Richtmikrofonsystem sowie Verfahren zum Betrieb eines derartigen Hörhilfegerätes
EP2262285B1 (fr) * 2009-06-02 2016-11-30 Oticon A/S Dispositif d'écoute fournissant des repères de localisation améliorés, son utilisation et procédé
JP5304571B2 (ja) * 2009-09-24 2013-10-02 沖電気工業株式会社 集音装置、音響通信システム及びプログラム
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GB2542961B (en) 2014-05-29 2021-08-11 Cirrus Logic Int Semiconductor Ltd Microphone mixing for wind noise reduction
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US10679640B2 (en) * 2018-08-16 2020-06-09 Harman International Industries, Incorporated Cardioid microphone adaptive filter

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Also Published As

Publication number Publication date
US7929721B2 (en) 2011-04-19
US20080044046A1 (en) 2008-02-21
US7324649B1 (en) 2008-01-29
EP1192838B1 (fr) 2003-08-06
WO2000076268A3 (fr) 2001-05-17
DK1192838T3 (da) 2003-10-27
DK1192838T4 (da) 2013-12-16
EP1192838B2 (fr) 2013-09-04
WO2000076268A2 (fr) 2000-12-14
DE50003206D1 (de) 2003-09-11

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