DK1690252T3 - Hearing with active noise compensation - Google Patents

Hearing with active noise compensation Download PDF

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Publication number
DK1690252T3
DK1690252T3 DK04797457.1T DK04797457T DK1690252T3 DK 1690252 T3 DK1690252 T3 DK 1690252T3 DK 04797457 T DK04797457 T DK 04797457T DK 1690252 T3 DK1690252 T3 DK 1690252T3
Authority
DK
Denmark
Prior art keywords
signal
hearing aid
ear canal
input
transducer
Prior art date
Application number
DK04797457.1T
Other languages
Danish (da)
Inventor
Jes Olsen
Original Assignee
Oticon As
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
Priority to DKPA200301744 priority Critical
Application filed by Oticon As filed Critical Oticon As
Priority to PCT/DK2004/000796 priority patent/WO2005052911A1/en
Application granted granted Critical
Publication of DK1690252T3 publication Critical patent/DK1690252T3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/45Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/453Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/108Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081Earphones, e.g. for telephones, ear protectors or headsets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/025In the ear hearing aids [ITE] hearing aids
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40Arrangements for obtaining a desired directivity characteristic
    • H04R25/407Circuits for combining signals of a plurality of transducers

Description

DESCRIPTION

AREA OF THE INVENTION

[0001] The invention relates to hearing aids, more specifically to hearing aids including means for receiving non-audio input signals.

BACKGROUND OF THE INVENTION

[0002] In hearing aids, which beside the transducers for receiving an audio input include means for receiving a non-audio input signal, e.g. a RF receiver, a telecoil for receiving magnetically transmitted signals, there is a possibility of loosing the information transmitted and received as a non-audio signal due to disturbance from the surrounding audio environment.

[0003] Hearing aids including noise reduction are well known. The noise reduction is hereby implemented in a way that enables the reduction of unwanted audio signal parts in the audio signal that is processed in the hearing aid, i.e. in the audio signal that is being processed in the hearing aid, by a spectral subtraction. A requirement for performing such noise or audio signal reduction is that the unwanted signal propagates through the hearing aid signal path.

[0004] This may in many situations provide a satisfactory result, however in situations where the signal cancellation is not sufficient there is still room for improvement. Especially in situations where a possibility exists for a significant part of the the audio signal to propagate into the ear canal bypassing the hearing aid signal path, which normally includes a microphone, a processor and a receiver.

[0005] US 6,445,799 B1 deals with a communications earpiece comprising an ear canal tube sized for positioning in an ear canal of a user so that the ear canal is at least partially open for directly receiving ambient sounds. A microphone port in the ear canal tube is located in the ear canal for detecting sounds in the ear canal. A speaker port in the ear canal tube is located in the ear canal in close proximity to the microphone port for broadcasting sound signals into the ear canal. A sound processor amplifies the ambient sounds received by the microphone to produce processed analogue signals. The sound processor also comprises noise cancellation means for producing an inverse noise signal of noise detected in the ear canal by the microphone. The inverse noise signal is sent to the speaker port so as to be broadcast into the ear canal thereby substantially cancelling the ambient noise in the ear canal. The objective of the present invention is therefore to provide a hearing aid, which provides noise reduction in situations where the previously known noise reduction will not provide a satisfactory result.

SUMMARY OF THE INVENTION

[0006] According to the invention this is achieved by means of the hearing aid as defined in claim 1.

[0007] By means of such hearing aid it is possible to at least attenuate sound signals that may bypass the signal path and enter the ear canal where the sound signal despite the hearing aid users hearing loss may cause disturbance in case an auxiliary signal is received, e.g. through a wireless or wired connection. This problem becomes increasingly important when a so-called open canal fitting is used in order to reduce the occlusion phenomena.

[0008] In an advantageous embodiment the hearing aid further comprises an internal input transducer for obtaining a sound signal within an ear canal, the internal input transducer being connected to the signal path.

[0009] When an auxiliary input is provided to the signal path, switching means are advantageously provided for switching to a state where the compensation signal is generated. The switching means are advantageously adapted for automatically generating the compensation signal upon receiving the additional input.

[0010] The invention will be explained more detailed in connection with the following description of a preferred embodiment with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG. 1 is a schematic drawing showing the principles of the invention;

FIG. 2 is a schematic drawing showing the principles of a second embodiment of the invention. DESCRIPTION OF A PREFERRED EMBODIMENT

[0012] From FIG. 1 a schematic representation of a hearing aid appears featuring the noise cancellation according to the invention. The hearing aid comprises a signal path with one or more external input transducers 1-N1, a signal processor performing compensation for hearing loss as well as the Noise cancellation part (ANC) and one or more output transducers 1-N3. In addition to this the signal path comprises one or more further input transducers 1-N2 placed internally, i.e. facing the interior of the ear canal or being integrated into the receiver, when the hearing aid is mounted. The internal input transducer(s) or error microphone(s) provides the signal present in the ear canal and feeds this to the signal processor, which generates an error signal capable of adjusting the attenuation signal and hence at least partly attenuate the undesired signal present in the ear canal. One or more separate output transducers are provided for the output of the compensating signal, where these correspond to those used for the normal hearing aid function. The compensation signal may be based on the input to the external input transducers 1-N1, which input correspond to the signal that is undesirable and where the compensation signal may be established based on this, e.g by changing the phase of this and further adjusting this based on the actual conditions present.

[0013] The hearing aid comprises further electrical input means 1-N4, e.g. a wireless receiver or a direct audio input receiver, which may be of any kind, e.g. a telecoil receiver or a radio frequency receiver. Means are preferably provided for attenuating the external input transducer signal, or switching this off.

[0014] From FIG. 2 a further embodiment appears where additional communication is established between the input and the hearing loss compensation and between the ANC and the hearing loss compensation.

[0015] In connection with the use of hearing aids there is most often a need for snugly fitting the hearing aid itself or an ear mould to the shape of the ear canal in order to avoid acoustic feedback. This normally existing requirement will to some extent provide remedy for the reduction of the level of the sound signal bypassing the signal path from the outside. In some systems there is however signal processing capabilities, including feedback cancellation, that enables the use of so-called open fittings, where a totally open ear canal or at least a significant opening in the hearing aid or the ear mould or around a tubing leading into the ear canal may be provided and hereby reduce the occlusion phenomena. It is obvious that such open fitting significantly will increase the possibility of sound signals bypassing the signal path. Hence the invention in this situation will have an even more significant impact.

REFERENCES CITED IN THE DESCRIPTION

This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description • US6445799B1 100051

Claims (5)

  1. A hearing aid comprising: a signal path comprising o an external input transducer, o a signal processor and o an output transducer, wherein the signal processor is adapted to produce a compensation signal capable of at least partially attenuating acoustic signals by: bypassing the signaling pathway and penetrating the hearing aid user's ear canal, the hearing aid further comprising • an open ear canal fitting to reduce occlusion, • a wireless receiver or a direct audio input receiver providing an auxiliary input signal (1, ..., N4) to the signaling pathway , • means for attenuating or switching off the external input transducer signal, • where switching means are provided to switch the signal processor to a state where the compensation signal is generated when the auxiliary input signal (1, ..., N4) is provided, • at least one internal input transducers (1, ..., N2) to obtain an audible signal within the ear canal where the internal input the transducer is connected to the signal path, and • where the compensation signal is based on signal (s) from the internal input transducer (s) (1, ..., N2) which provide the signal present in the ear canal.
  2. Hearing aid according to claim 1, wherein the switch means is adapted to automatically produce the compensation signal upon receiving the auxiliary input signal (1, ..., N4).
  3. Hearing aid according to claim 1, wherein at least a substantial opening in the hearing aid or an earplug or around a tube leading into the ear canal is provided.
  4. Hearing aid according to claim 1, wherein the wireless receiver is a telephoto receiver for receiving magnetically transmitted signals, or a radio frequency receiver.
  5. Hearing aid according to claim 1, wherein the compensation signal is further based on the input to the external input transducer (s) (1, ..., N1).
DK04797457.1T 2003-11-26 2004-11-18 Hearing with active noise compensation DK1690252T3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DKPA200301744 2003-11-26
PCT/DK2004/000796 WO2005052911A1 (en) 2003-11-26 2004-11-18 Hearing aid with active noise canceling

Publications (1)

Publication Number Publication Date
DK1690252T3 true DK1690252T3 (en) 2017-10-09

Family

ID=34626321

Family Applications (1)

Application Number Title Priority Date Filing Date
DK04797457.1T DK1690252T3 (en) 2003-11-26 2004-11-18 Hearing with active noise compensation

Country Status (4)

Country Link
EP (1) EP1690252B1 (en)
CN (1) CN1886782B (en)
DK (1) DK1690252T3 (en)
WO (1) WO2005052911A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8031878B2 (en) * 2005-07-28 2011-10-04 Bose Corporation Electronic interfacing with a head-mounted device
GB2434708B (en) 2006-01-26 2008-02-27 Sonaptic Ltd Ambient noise reduction arrangements
AT435572T (en) * 2006-12-01 2009-07-15 Siemens Audiologische Technik Hearing device with noise suspension and corresponding method
EP1933589A1 (en) * 2006-12-14 2008-06-18 Phonak AG A hearing instrument, and a method of operating a hearing instrument
US8014548B2 (en) 2006-12-14 2011-09-06 Phonak Ag Hearing instrument, and a method of operating a hearing instrument
DK2023664T3 (en) * 2007-08-10 2013-06-03 Oticon As Active noise cancellation in hearing aids
EP2028877B1 (en) 2007-08-24 2012-02-22 Oticon A/S Hearing aid with anti-feedback system
US8494201B2 (en) * 2010-09-22 2013-07-23 Gn Resound A/S Hearing aid with occlusion suppression
EP2584794A1 (en) 2011-10-17 2013-04-24 Oticon A/S A listening system adapted for real-time communication providing spatial information in an audio stream
US10390155B2 (en) 2016-02-08 2019-08-20 K/S Himpp Hearing augmentation systems and methods
US10284998B2 (en) 2016-02-08 2019-05-07 K/S Himpp Hearing augmentation systems and methods
US10341791B2 (en) 2016-02-08 2019-07-02 K/S Himpp Hearing augmentation systems and methods

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK159357C (en) * 1988-03-18 1991-03-04 Oticon As Hearing aid, especially for placement in the ear
DE4010372C2 (en) * 1990-03-30 1993-02-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
CN1391780A (en) 1999-11-22 2003-01-15 布瑞汉姆·扬大学 Hearing aid device incorporating signal processing techniques
US5740258A (en) 1995-06-05 1998-04-14 Mcnc Active noise supressors and methods for use in the ear canal
US6445799B1 (en) 1997-04-03 2002-09-03 Gn Resound North America Corporation Noise cancellation earpiece
DE10332119B3 (en) * 2003-07-16 2004-12-09 Siemens Audiologische Technik Gmbh Hearing aid worn in ear or with otoplastic worn in ear generates second acoustic earpiece signal region of ventilation channel to inhibit acoustic signal entering closed ear canal volume from outside

Also Published As

Publication number Publication date
EP1690252B1 (en) 2017-07-12
CN1886782B (en) 2010-10-06
EP1690252A1 (en) 2006-08-16
WO2005052911A1 (en) 2005-06-09
CN1886782A (en) 2006-12-27

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