EP2055140B1 - Procede de reglage d'un instrument auditif - Google Patents

Procede de reglage d'un instrument auditif Download PDF

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Publication number
EP2055140B1
EP2055140B1 EP06792685A EP06792685A EP2055140B1 EP 2055140 B1 EP2055140 B1 EP 2055140B1 EP 06792685 A EP06792685 A EP 06792685A EP 06792685 A EP06792685 A EP 06792685A EP 2055140 B1 EP2055140 B1 EP 2055140B1
Authority
EP
European Patent Office
Prior art keywords
microphones
microphone
hearing instrument
stability
better
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.)
Not-in-force
Application number
EP06792685A
Other languages
German (de)
English (en)
Other versions
EP2055140A2 (fr
Inventor
Andi Vonlanthen
Andreas Von Buol
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.)
Sonova Holding AG
Original Assignee
Phonak AG
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
Application filed by Phonak AG filed Critical Phonak AG
Publication of EP2055140A2 publication Critical patent/EP2055140A2/fr
Application granted granted Critical
Publication of EP2055140B1 publication Critical patent/EP2055140B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H04R25/43—Electronic input selection or mixing based on input signal analysis, e.g. mixing or selection between microphone and telecoil or between microphones with different directivity characteristics
    • 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
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically
    • 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
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
    • 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

  • This invention relates generally to a method of adjusting a hearing instrument.
  • Hearing instruments such as hearing devices or hearing aids, are often equipped with a multi-microphone system in order to provide directional information of the sound.
  • two microphones are located at the hearing instrument in a predefined distance from each other.
  • ITE in-the-ear
  • CIC completely-in-the-canal
  • the feedback stability and maximum stable gain are depending on the actual microphone location in relation to the venting of the hearing instrument housing, the pinna or other environmental influences caused by the physics of the user of the hearing instrument. Therefore, even if the distance between two technically identical microphones is very small, the feedback stability and maximum stable gain are different for those two microphones.
  • EP 1 221 276 a method for adapting a hearing device and a hearing device with two microphones for directional-use is described.
  • the use of a switching unit to switch the connecting outputs of the microphones to the digital signal processing unit is proposed.
  • the forward and backward location of the microphones within the hearing device in relation to the front of the head of the user may be adapted and thus the hearing device may be used either for the left or the right ear of the user, providing correct directional information.
  • this document teaches a predefined operational connection of multiple microphones to a digital signal processing unit.
  • EP 1 309 225 a method for determining the feedback threshold of a microphone in a given location or position respectively within a hearing device and therefore the determination of the maximum gain for this microphone in a given acoustical setup is provided.
  • This method may be used for limiting the maximum gain for a specific microphone or to determine the value of the maximum gain for a specific microphone for providing feedback stability of the hearing instrument concerned.
  • the present invention provides a method of adjusting a hearing instrument, the hearing instrument comprising at least two microphones and an amplifying processing unit, the method comprising the steps of:
  • the microphone determined to have the better feedback stability will be used, i.e. will be operationally connected to the amplifier or amplifying processing unit of the hearing instrument. Thus, a better performance rather than switching to a predetermined microphone will be achieved.
  • the method further comprises the steps of:
  • This embodiment takes into account the acoustical stability of each of the microphones in order to optimally combine the microphones to achieve an optimal omni-directional performance if desired by the user of the hearing instrument.
  • the known current solutions only propose the selection of one predetermined specific microphone, i.e. the microphone in the forward position of the shell of the hearing instrument, not taking into account the specific, individual acoustical stability of the microphones of a specific hearing instrument.
  • the determination of the proportion and phase of the signals of the microphones will be made as a function of frequency and the proportion and phase of the signals of the microphone will be set and modified accordingly. This takes into account that the microphones may have different acoustic performance for different frequencies. To provide excellent omni-directional performance, both microphones will remain active, but the proportion and phase of the signals of the different microphones will be used dependent of the actual frequencies of the sound.
  • the microphone location effect is estimated by taking into account the different contributions of reflected sound by the pinna.
  • the "microphone location effect” describes the amplification from free field sound to the microphone e.g. by reflections on the pinna. This effect may be measured directly for a certain range of frequencies for a specific hearing instrument inserted within the ear of the individual user of this hearing instrument. This may be performed either during the fitting process based on the real situation or based on stored geometrical data of the microphone location and the geometry of the pinna and the ear canal of the user retrieved during a customized shell molding process. This step is especially useful for hearing instruments of the type of ITE and CIC.
  • the feedback stability for each of the microphones is estimated by performing measurement on the ear of an individual user during the fitting process. Such a process is known and described for instance in EP 1 309 225 .
  • the feedback stability for the microphones is estimated based on geometrical data of the location of the microphone and vent of the hearing instrument.
  • the feedback stability will be calculated based on stored geometrical data of the hearing instrument and the geometry of the ear canal that may be recorded and stored during the molding process of the shell of a hearing instrument to be inserted into the ear canal.
  • the best microphone is determined and its location is selected as the only microphone to be used in an omni-directional mode.
  • the omni-directional mode only one of the at least two microphones of the hearing instrument will be operationally connected to the amplifier or amplifying processing unit of the hearing instrument. This only one microphone is not a predefined microphone but the microphone with the better acoustic performance.
  • the best microphone is determined by weighting maximum stable overall amplifications as a function of frequency and selecting the most stable amplification.
  • the maximum stable overall amplification is calculated as a function of frequency by adding the above described "microphone location effect" and the feedback threshold.
  • the feedback threshold describes the maximum stable amplification of the hearing instrument from the microphone to the eardrum of the individual user of the hearing instrument.
  • the weighting is done by a predefined rule that is independent of individual hearing loss.
  • the rule only takes into account the data retrieved by the hearing instrument itself and its position and influence by the geometry of the ear canal and the pinna.
  • the weighting is done by a predefined rule that is dependent of individual hearing loss.
  • the individual hearing loss of the user will be taken into account by the rule. This might be done for instance by estimating the feedback stability only for a specific range or multiple ranges of frequencies specified by he individual hearing loss of the user of the hearing instrument.
  • the selection of the better microphone position is done by switching the operative connection of the microphones to the previously determined better microphone, i.e. the microphone with the higher maximum stable overall amplification. This switching may be performed by using a switching unit within the hearing device to automatically connect only the better microphone to the amplifier or to the signal processing unit and/or to disconnect the other microphones respectively.
  • the inventive method above will be applied to a hearing instrument that is at least partially insertable into an ear canal.
  • Fig. 1 schematically shows a partial cross-section of the external ear with a hearing instrument partially inserted into the ear canal.
  • FIG 1 the schematic drawing of an ITE hearing aid 1 at least partially inserted into the ear canal 2 is shown.
  • the hearing aid comprises two microphones 3 and 4, located on the front side of the shell of the hearing aid 1. Both microphones 3 and 4 are connected to an amplifying processing unit 5, arranged within the shell of the hearing aid 1.
  • This amplifying processing unit 5 drives a receiver 6 which is acoustically coupled to the ear canal 2 via a conduct 7.
  • the hearing aid 1 further comprises a venting canal 8 that connects the ear canal 2 with the environment.
  • the better of the two microphones 3 and 4 remains connected to the amplifying processing unit 5 and the other microphone will be disconnected from the amplifying processing unit 5.
  • This switching is performed i.e. by using a switching unit as described in EP 1 221 276 .
  • both microphones 3 and 4 remain connected to the amplifying processing unit 5.
  • the amplifying processing unit 5 will set only one of those microphones active for determined ranges of frequencies, i.e. by applying respectively set filters. As an example it thus may be the case that the first microphone 3 is activated for low frequencies and the second microphone 4 is activated for high frequencies, providing an even better acoustic performance than using only one microphone for the whole range of frequencies.
  • the present solution advantageously takes the acoustical stability into account when combining the two microphones or selecting one of the two microphones for omni-directional use. Therefore the better microphone will be selected and thus a higher stable gain and less feedback related problems will be achieved for hearing devices with at least two microphones for the omni-directional mode.

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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)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Claims (9)

  1. Procédé de réglage d'un instrument auditif (1), l'instrument auditif (1) comprenant au moins deux microphones (3;4) et une unité de traitement amplifiante (5), le procédé est caractérisé en comprenant les pas de:
    - estimer l'effet de positionnement du microphone en décrivant l'amplification du bruit de champs libre au microphone pour chacun des microphones (3;4);
    - estimer la stabilité de feedback pour chacun des microphones (3;4);
    - déterminer le microphone (3;4) avec la meilleure stabilité de feedback destiné à être utilisé dans un mode omni directionnel.
  2. Procédé selon la revendication 1 comprenant en plus les pas de:
    - déterminer la proportion et phase des signaux au moins des deux autres microphones (3;4) destinés à être utilisés dans un mode omni directionnel; et
    - régler la proportion et phase des signaux des microphones (3;4).
  3. Procédé selon la revendication 2, la détermination de la proportion et phase des signaux au moins des deux microphones (3;4) va être faite comme fonction de la fréquence et la proportion et phase des signaux du microphone vont être réglées et modifiées de manière correspondante.
  4. Le procédé selon la revendication 1, l'effet de positionnement du microphone du microphone avec la stabilité de feedback meilleure est estimé en considérant les contributions différentes du bruit reflété par le pavillon d'oreille (9).
  5. Le procédé selon la revendication 1, la stabilité de feedback pour les microphones (3;4) est estimée par performant des mesurages à l'oreille d'un utilisateur individuel pendant le procédé de réglage de l'instrument auditif (1).
  6. Le procédé selon la revendication 1, la stabilité de feedback des microphones (3;4) est estimée se basant sur des dates géométriques du positionnement des microphones (3;4) et passage (8) de l'instrument auditif (1).
  7. Le procédé selon la revendication 1, le microphone (3;4) avec la stabilité de feedback meilleure est déterminé et est sélecté comme microphone unique (3;4) destiné à être utilisé dans un mode omni directionnel, le microphone (3;4) avec la stabilité de feedback meilleure étant déterminé par considérer des amplifications maximum stables comme une fonction de la fréquence et sélectant l'amplification la plus stable.
  8. Le procédé selon la revendication 7, la sélection du microphone est faite par actionner la connexion opérative des microphones (3;4) avec l'unité the traitement amplifiante (5) au microphone (3;4) avec la stabilité de feedback meilleure déterminé auparavant.
  9. Appliquer le procédé selon une des revendications 1 à 8 pour un instrument auditif qui est au moins partiellement insérable dans le canal d'oreille.
EP06792685A 2006-08-03 2006-08-03 Procede de reglage d'un instrument auditif Not-in-force EP2055140B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/065051 WO2006136615A2 (fr) 2006-08-03 2006-08-03 Procede de reglage d'un instrument auditif

Publications (2)

Publication Number Publication Date
EP2055140A2 EP2055140A2 (fr) 2009-05-06
EP2055140B1 true EP2055140B1 (fr) 2010-11-03

Family

ID=37570796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06792685A Not-in-force EP2055140B1 (fr) 2006-08-03 2006-08-03 Procede de reglage d'un instrument auditif

Country Status (5)

Country Link
EP (1) EP2055140B1 (fr)
AT (1) ATE487338T1 (fr)
DE (1) DE602006018080D1 (fr)
DK (1) DK2055140T3 (fr)
WO (1) WO2006136615A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110026746A1 (en) * 2007-09-20 2011-02-03 Phonak Ag Method for determining of feedback threshold in a hearing device and a hearing device
ATE515154T1 (de) * 2007-09-20 2011-07-15 Phonak Ag Verfahren zur bestimmung einer rückkopplungsschwelle in einem hörgerät
DK2088802T3 (da) 2008-02-07 2013-10-14 Oticon As Fremgangsmåde til estimering af lydsignalers vægtningsfunktion i et høreapparat
EP2268063A1 (fr) * 2009-06-26 2010-12-29 Siemens Medical Instruments Pte. Ltd. Système et procédé de personnalisation d'un dispositif d'aide auditive

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757933A (en) * 1996-12-11 1998-05-26 Micro Ear Technology, Inc. In-the-ear hearing aid with directional microphone system
CA2387036C (fr) * 1999-10-14 2008-08-12 Andi Vonlanthen Procede d'adaptation d'un appareil auditif, et appareil auditif
EP1309225B1 (fr) * 2002-10-02 2014-04-16 Phonak Ag Procédé pour déterminer le seuil de couplage dans une prothèse auditive

Also Published As

Publication number Publication date
EP2055140A2 (fr) 2009-05-06
WO2006136615A2 (fr) 2006-12-28
ATE487338T1 (de) 2010-11-15
DE602006018080D1 (fr) 2010-12-16
DK2055140T3 (da) 2011-02-21
WO2006136615A3 (fr) 2007-08-02

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