EP2219389B1 - Dispositif et procédé d'estimation des bruits parasites dans l'arrivée d'un appareil auditif binauréal - Google Patents

Dispositif et procédé d'estimation des bruits parasites dans l'arrivée d'un appareil auditif binauréal Download PDF

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Publication number
EP2219389B1
EP2219389B1 EP09178490A EP09178490A EP2219389B1 EP 2219389 B1 EP2219389 B1 EP 2219389B1 EP 09178490 A EP09178490 A EP 09178490A EP 09178490 A EP09178490 A EP 09178490A EP 2219389 B1 EP2219389 B1 EP 2219389B1
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EP
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Prior art keywords
microphone
directional
binaural
hearing device
directional characteristic
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EP09178490A
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German (de)
English (en)
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EP2219389A1 (fr
Inventor
Eghart Fischer
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 Pte Ltd
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Siemens Medical Instruments 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
    • H04R25/55—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
    • H04R25/552—Binaural
    • 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
    • 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
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/401—2D or 3D arrays of transducers

Definitions

  • Hearing aids are portable hearing aids that are used to care for the hearing impaired.
  • different types of hearing aids such as behind-the-ear hearing aids, hearing aids with external earphones and in-the-ear hearing aids, e.g. also provided Concha hearing aids or channel hearing aids.
  • the hearing aids listed by way of example are worn on the outer ear or in the ear canal.
  • bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The stimulation of the damaged hearing takes place either mechanically or electrically.
  • Hearing aids have in principle as essential components an input transducer, an amplifier and an output transducer.
  • the input transducer is usually a sound receiver, z. As a microphone, and / or an electromagnetic receiver, for. B. an induction coil.
  • the output transducer is usually used as an electroacoustic transducer, z. As miniature speaker, or as an electromechanical transducer, z. B. bone conduction, realized.
  • the amplifier is usually integrated in a signal processing unit.
  • FIG. 1 illustrated by the example of a behind-the-ear hearing aid 1.
  • a hearing aid housing 2 for carrying behind the ear one or more microphones 3 are incorporated for receiving the sound from the environment.
  • a signal processing unit 4 which is also integrated in the hearing aid housing 2, processes the microphone signals and amplifies them.
  • the output signal of the signal processing unit 4 is transmitted to a loudspeaker or receiver 5, which outputs an acoustic signal.
  • the sound is optionally transmitted via a sound tube, not shown, which is fixed with an earmold in the ear canal, to the eardrum of the hearing aid wearer.
  • the power supply of the hearing device 1 and in particular that of the signal processing unit 4 is effected by a battery 6 likewise integrated into the hearing device housing 2.
  • cepstral smooth Another way of improving speech and suppressing "musical tones" is to "cepstral smooth" the weighting of spectral filters.
  • a recursive, temporal smoothing is applied essentially to higher cepstral coefficients, excluding those coefficients which represent the pitch information. This method is also effective for non-stationary noises.
  • Directional microphones are also one of the methods of noise suppression that has been established for years and demonstrably improve speech intelligibility in listening situations in which the useful signal and the interference signals come from different directions.
  • the directivity is differential Processing of two or more adjacent microphones with omnidirectional characteristics generated.
  • FIG. 2 shows a simplified block diagram of a directional microphone system 1st order with a first and a second microphone 3A, 3B at a distance of about 10 to 15 mm.
  • This results for sound signals coming from the front V an external delay of T2 between the two microphones 3A, 3B, which corresponds to the distance of the microphones 3A, 3B to each other.
  • the signal R2 of the second microphone 3B is delayed by the time T1 in a delay unit 7, inverted in the inverter 8 and added to the signal R1 of the first microphone 3A in an adder 9.
  • the sum results in the directional microphone signal RA, which can be supplied to a listener, for example via signal processing.
  • the direction-dependent sensitivity arises essentially from a subtraction of the second microphone signal R2 delayed by the time T2 from the first signal R1. Sound signals from the front V are thus, after appropriate equalization, not attenuated, while, for example, sound signals are extinguished from the side S or from behind.
  • Hamacher, V Comparison of advanced monaural and binaural noise reduction algorithms for hearingaids; IEEE 2002, pages IV-4008 to IV-4011 discloses a combination of monaural and binaural noise power estimation in hearing aids, wherein the monaural noise power is considered only for frequencies below a certain frequency.
  • the stated object is achieved with the device for noise estimate of the independent claim 1 or 2 and the method for noise estimate of the independent claim 7 and 8, respectively.
  • the invention claims a device for noise estimation with a first and a second hearing aid for the binaural supply of a hearing impaired, wherein the hearing aids each having a first and a second omnidirectional microphone and the two microphones of each hearing aid to form a first and / or a second directional microphone with a monaural directional characteristic are electrically interconnected.
  • the first and / or second microphone of the first hearing device is wirelessly interconnected with the first and / or second microphone of the second hearing device to form a directional microphone having a binaural directional characteristic.
  • the level of an output signal of the first and / or the second directional microphone having a monaural directional characteristic is linked to the level of an output signal of the directional microphone having a binaural directional characteristic. This offers the advantage that noise can be estimated better and more robust.
  • the first and / or second monaural directional characteristic can form a zero point in the direction of a useful sound source.
  • the first and / or second monaural directional characteristics may form a monaural anti-kidney.
  • the binaural directional characteristic can advantageously form a zero point in the direction of the useful sound source.
  • the binaural directional characteristic can form a binaural eight.
  • the estimation can be formed by maximizing the levels of the output signals of the directional microphones.
  • the estimation can be formed by summing the level of the output signals of the directional microphones.
  • the invention also claims a method for noise estimation with a first and a second hearing aid for the binaural care of a hearing impaired person, wherein the hearing aids each have a first and a second omnidirectional microphone and the two microphones of each hearing aid to form a first and / or a second monaural directional characteristic electrically interconnected.
  • the first or second microphone of the first hearing device is wirelessly interconnected with the first or second microphone of the second hearing device to form a binaural directional characteristic.
  • the level of an output signal of the first and / or the second directional microphone having a monaural directional characteristic is linked to the level of an output signal of the directional microphone having a binaural directional characteristic. This optimizes the noise estimate.
  • the first and / or second monaural directional characteristic can be formed with a zero point in the direction of a useful sound source.
  • the binaural directional characteristic can be formed with a zero point in the direction of the useful sound source.
  • the estimation may be formed by maximizing the levels of the output signals of the directional microphones.
  • the estimation may be formed by summing the levels of the output signals of the directional microphones.
  • FIG. 3 shows a sectional view through the head 10 of a hearing aid wearer with a first hearing aid 1A.
  • the cut takes place parallel to a ground surface at the level of the first hearing device 1A.
  • the first hearing aid 1A comprises a first and a second microphone 3A, 3B.
  • the two microphones 3A, 3B are close to each other and are electrically interconnected in such a way that they form a spatial directional characteristic in the form of an anti-kidney 11.
  • the directional characteristic Around a 0 ° direction, from which a useful signal comes, the directional characteristic has a region 13 of strong attenuation. With this monaural Directional characteristic 11 is an estimate of noise possible.
  • the monaural anti-kidney has a relatively large opening angle around the 0 ° direction. That it forms as a directional characteristic a kind of "cone” around the 0 ° direction, in which the sensitivity of the microphone characteristic gradually increases from the inside to the outside.
  • a safe, robust "front / back" distinction is possible.
  • FIG. 4 shows a sectional view through the head 10 of a hearing aid wearer with a first hearing aid 1A and a second hearing aid 1B for binaural care. The cut takes place parallel to a ground surface in the amount of the two hearing aids 1A, 1B.
  • the first and second hearing aids 1A, 1B each include a first microphone 3A.
  • the first microphone 3A of the first hearing device 1A is wirelessly interconnected with the first microphone 3A of the second hearing device 1B to form a directional microphone with a binaural directional characteristic 12.
  • a spatial directional characteristic 12 is generated which corresponds to an "eight" which lies in the direction of the axis connecting the two microphones 3A and in the 0 ° plane ideally an area 13 with zero sensitivity having.
  • the binaural Eight 12 has the major drawback that, although the 0 ° direction sensitivity is theoretically zero, not only in the horizontal 0 ° direction, but in the entire vertical 0 ° plane around the head 10. This means that sources that are located directly above or behind the head 10, for example, are attenuated in the same way as sources from the 0 ° direction. Thus, these sources are implicitly added to a useful signal. However, the relatively narrow opening angle in the 0 ° plane is advantageous.
  • the aforementioned directional characteristics 11, 12 are combined for noise estimation in such a way that the advantages are utilized and the disadvantages are compensated.
  • FIG. 5 shows a sectional view through the head 10 of a hearing aid wearer with a first hearing aid 1A and a second hearing aid 1B for binaural care. The cut takes place parallel to a ground surface in the amount of the two hearing aids 1A, 1B.
  • the first hearing aid 1A comprises a first microphone 3A and a second microphone 3B.
  • the second hearing aid 1B comprises a first microphone 3A.
  • the first microphone 3A of the first hearing device 1A is wirelessly interconnected with the first microphone 3A of the second hearing device 1B to form a directional microphone with a binaural directional characteristic 12. For example, by simply subtracting the microphone signals of the two microphones 3A, a spatial directional characteristic 12 is generated, which corresponds to an "eight", which lies in the direction of the axis connecting the microphones 3A and ideally has zero sensitivity in the 0 ° plane.
  • the two microphones 3A, 3B of the first hearing aid 1A lie close to one another and are electrically interconnected in such a way that they form a spatial directional characteristic in the form of an anti-kidney 11.
  • the directional characteristic Around a 0 ° direction, from which a useful signal comes, the directional characteristic has a region 13 of strong attenuation.
  • the narrow opening angle in the horizontal direction ensures a strongly dependent on the horizontal viewing direction of a hearing aid wearer, which comes close to that of a very narrow "beam".
  • the slightly wider opening in the vertical direction ensures that a useful signal range is less dependent on a head tilt of the hearing aid wearer.

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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)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Claims (10)

  1. Dispositif d'estimation de bruits parasites au moyen d'un premier et d'un second appareils auditifs (1A, 1B) pour l'audition binaurale d'un malentendant, les appareils auditifs (1A, 1B) présentant respectivement un premier et un second microphones omnidirectionnels (3A, 3B) et les deux microphones (3A, 3B) de chaque appareil auditif (1A, 1B) étant connectés électriquement entre eux pour former un premier et un second microphones directionnels à caractéristique directionnelle (11),
    caractérisé en ce
    que le premier ou le second microphone (3A, 3B) du premier appareil auditif (1A) est connecté sans fil au premier ou au second microphone (3A, 3B) du second appareil auditif (1B) pour former un microphone directionnel à caractéristique directionnelle binaurale (12), et en ce que pour estimer les bruits parasites les niveaux de signaux de sortie du premier et du second microphones directionnels à caractéristique directionnelle monaurale (11) sont reliés au niveau d'un signal de sortie du microphone directionnel à caractéristique directionnelle binaurale (12), et en ce que le dispositif est adapté de manière à ce que la première et la seconde caractéristiques directionnelles monaurales (11) et la caractéristique directionnelle binaurale (12) forment un zéro en direction d'une source sonore utile.
  2. Dispositif d'estimation de bruits parasites au moyen d'un premier et d'un second appareils auditifs (1A, 1B) pour l'audition binaurale d'un malentendant, le premier appareil auditif (1A) présentant un premier microphone omnidirectionnel (3A) et le second appareil auditif (1B) présentant un premier et un second microphones omnidirectionnels (3A, 3B) et les microphones (3A, 3B) du second appareil auditif (1B) étant connectés entre eux électriquement pour former un microphone directionnel à caractéristique directionnelle monaurale (11),
    caractérisé en ce
    que le premier microphone (3A) du premier appareil auditif (1A) est connecté sans fil au premier ou au second microphone (3A, 3B) du second appareil auditif (1B) pour former un microphone directionnel à caractéristique directionnelle binaurale (12), et en ce que pour estimer les bruits parasites, le niveau d'un signal de sortie du microphone directionnel à caractéristique directionnelle monaurale (11) est relié au niveau d'un signal de sortie du microphone directionnel à caractéristique directionnelle binaurale (12), et en ce que le dispositif est adapté de manière à ce que la caractéristique directionnelle monaurale (11) et la caractéristique directionnelle binaurale (12) forment un zéro en direction d'une source sonore utile.
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce
    qu'au moins une des caractéristiques directionnelles monaurales (11) forme un anti-rein monaural.
  4. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la caractéristique directionnelle binaurale (12) forme un huit binaural.
  5. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la liaison est réalisée au moyen d'une formation du maximum des niveaux des signaux de sortie des microphones directionnels.
  6. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la liaison est réalisée au moyen d'une formation de la somme des niveaux des signaux de sortie des microphones directionnels.
  7. Procédé d'estimation de bruits parasites au moyen d'un premier et d'un second appareils auditifs (1A, 1B) pour l'audition binaurale d'un malentendant, les appareils auditifs (1A, 1B) présentant respectivement un premier et un second microphones omnidirectionnels (3A, 3B) et les deux microphones (3A, 3B) de chaque appareil auditif (1A, 1B) étant connectés entre eux électriquement pour former une première et une seconde caractéristiques directionnelles monaurales (11),
    caractérisé en ce
    que le premier ou le second microphones (3A, 3B) du premier appareil auditif (1A) est connecté sans fil au premier ou au second microphone (3A, 3B) du second appareil auditif (1B) pour former une caractéristique directionnelle binaurale (12), en ce que pour estimer les bruits parasites les niveaux de signaux de sortie du premier et du second microphones directionnels à caractéristique monaurale (11) sont reliés au niveau d'un signal de sortie du microphone directionnel à caractéristique directionnelle binaurale (12) et
    en ce que la première et la seconde caractéristiques directionnelles monaurales (11) et la caractéristique directionnelle binaurale (12) sont formées par un zéro en direction d'une source sonore utile.
  8. Procédé d'estimation de bruits parasites au moyen d'un premier et d'un second appareils auditifs (1A, 1B) pour l'audition binaurale d'un malentendant, le premier appareil auditif (1A) présentant un premier microphone omnidirectionnel (3A) et le second appareil auditif (1B) présentant un premier et un second microphones omnidirectionnels (3A, 3B) et les deux microphones (3A, 3B) du second appareil auditif (1B) étant connectés entre eux électriquement pour former une caractéristique directionnelle monaurale (11),
    caractérisé en ce
    que le premier microphone (3A) du premier appareil auditif (1A) est connecté sans fil au premier ou au second microphone (3A, 3B) du second appareil auditif (1B) pour former une caractéristique directionnelle binaurale (12),
    en ce que pour estimer les bruits parasites le niveau d'un signal de sortie du microphone directionnel à caractéristique directionnelle monaurale (11) est relié au niveau d'un signal de sortie du microphone directionnel à caractéristique directionnelle binaurale (12), et
    en ce que la caractéristique directionnelle monaurale (11) et la caractéristique directionnelle binaurale (12) sont formées par un zéro en direction d'une source sonore utile.
  9. Procédé selon la revendication 7 ou 8,
    caractérisé en ce
    que l'estimation est formée au moyen d'une formation du maximum des niveaux des signaux de sortie des microphones directionnels.
  10. Procédé selon l'une quelconque des revendications 7 à 9,
    caractérisé en ce
    que l'estimation est réalisée au moyen d'une formation de la somme des niveaux des signaux de sortie des microphones directionnels.
EP09178490A 2009-02-16 2009-12-09 Dispositif et procédé d'estimation des bruits parasites dans l'arrivée d'un appareil auditif binauréal Active EP2219389B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009009040A DE102009009040A1 (de) 2009-02-16 2009-02-16 Vorrichtung und Verfahren zur Störgeräuschschätzung bei einer binauralen Hörgeräteversorgung

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EP2219389A1 EP2219389A1 (fr) 2010-08-18
EP2219389B1 true EP2219389B1 (fr) 2011-11-16

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US (1) US8625826B2 (fr)
EP (1) EP2219389B1 (fr)
AT (1) ATE534244T1 (fr)
DE (1) DE102009009040A1 (fr)
DK (1) DK2219389T3 (fr)

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Publication number Priority date Publication date Assignee Title
KR101757461B1 (ko) 2011-03-25 2017-07-26 삼성전자주식회사 배경잡음의 스펙트럼 밀도를 추정하는 방법 및 이를 수행하는 프로세서
DK2592850T3 (da) 2011-11-08 2018-08-06 Sivantos Pte Ltd Automatisk aktivering og deaktivering af et binauralt høresystem
EP2823631B1 (fr) * 2012-07-18 2017-09-06 Huawei Technologies Co., Ltd. Dispositif électronique portable ayant des microphones directionnels pour un enregistrement stéréo

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US8200837B1 (en) 1999-04-26 2012-06-12 Hewlett-Packard Development Company, L.P. Method and system for maintaining a content server at safe load conditions
DE10208031A1 (de) 2002-02-26 2003-09-04 Dassler Puma Sportschuh Verfahren zur Herstellung eines wasserdichten Schuhs und wasserdichter Schuh
US7610606B2 (en) * 2002-05-03 2009-10-27 Time Warner Cable, Inc. Technique for effectively providing various entertainment services through a communications network
US7369669B2 (en) * 2002-05-15 2008-05-06 Micro Ear Technology, Inc. Diotic presentation of second-order gradient directional hearing aid signals
US20040175008A1 (en) * 2003-03-07 2004-09-09 Hans-Ueli Roeck Method for producing control signals, method of controlling signal and a hearing device
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
US20050183120A1 (en) * 2004-01-13 2005-08-18 Saurabh Jain Multi-user personalized digital multimedia distribution methods and systems
US7860013B2 (en) * 2005-03-09 2010-12-28 Comcast Cable Holdings, Llc Methods and systems for using in-stream data within an on demand content delivery path
US7823179B2 (en) * 2005-04-18 2010-10-26 Cisco Technology, Inc. System and method for edge resource management
US8181209B2 (en) * 2005-11-21 2012-05-15 Time Warner Cable Inc. Methods and apparatus for providing video on demand and network PVR functions using IP streaming
US8000233B2 (en) * 2006-02-28 2011-08-16 Alcatel Lucent Method and apparatus for real-time application-driven resource management in next generation networks

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Publication number Publication date
US8625826B2 (en) 2014-01-07
ATE534244T1 (de) 2011-12-15
US20100208921A1 (en) 2010-08-19
EP2219389A1 (fr) 2010-08-18
DK2219389T3 (da) 2012-03-05
DE102009009040A1 (de) 2010-09-02

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