EP1690252A1 - Hearing aid with active noise canceling - Google Patents

Hearing aid with active noise canceling

Info

Publication number
EP1690252A1
EP1690252A1 EP04797457A EP04797457A EP1690252A1 EP 1690252 A1 EP1690252 A1 EP 1690252A1 EP 04797457 A EP04797457 A EP 04797457A EP 04797457 A EP04797457 A EP 04797457A EP 1690252 A1 EP1690252 A1 EP 1690252A1
Authority
EP
European Patent Office
Prior art keywords
signal
hearing aid
signal path
input
ear canal
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
EP04797457A
Other languages
German (de)
French (fr)
Other versions
EP1690252B1 (en
Inventor
Jes c/o Oticon A/S OLSEN
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.)
Oticon AS
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
Application filed by Oticon AS filed Critical Oticon AS
Publication of EP1690252A1 publication Critical patent/EP1690252A1/en
Application granted granted Critical
Publication of EP1690252B1 publication Critical patent/EP1690252B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods 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
    • G10K11/1781—Methods 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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods 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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods 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
    • G10K11/1783—Methods 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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods 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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods 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
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods 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
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • 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
    • H04R2225/025—In the ear hearing aids [ITE] hearing aids
    • 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

Definitions

  • the invention relates to hearing aids, more specifically to hearing aids including means for receiving non-audio input signals.
  • 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.
  • a non-audio input signal e.g. a RF receiver
  • a telecoil for receiving magnetically transmitted signals
  • 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, y 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.
  • the hearing aid signal path which normally includes a microphone, a processor and a receiver.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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 a 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, wheer 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.
  • 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.
  • 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.
  • 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.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention relates to a hearing aid comprising a signal path with an input transducer, a signal processor and an output transducer, the signal processor being adapted to produce a compensation signal capable of at least partly attenuating acoustic signals bypassing the signal path and entering the ear canal.

Description

Hearing Aid with active noise canceling
AREA OF THE INVENTION
The invention relates to hearing aids, more specifically to hearing aids including means for receiving non-audio input signals. BACKGROUND OF THE INVENTION
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.
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, y 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.
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.
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
According to the invention this is achieved by means of the hearing aid as defined in claim 1.
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.
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.
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.
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
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
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 a 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, wheer 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.
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.
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.
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.

Claims

1. A hearing aid comprising a signal path with an input transducer, a signal processor and an output transducer, the signal processor being adapted to produce a compensation signal capable of at least partly attenuating acoustic signals bypassing the signal path and entering the ear canal.
2. A hearing aid according to claim 1, where the hearing aid further comprises at least one internal input transducer for obtaining a sound signal within the ear canal, the internal input transducer being connected to the signal path.
3. A hearing aid according to claim 1 or 2, where an auxiliary input is provided to the signal path.
4. A hearing aid according to claim 1, 2 or 3, where switching means are provided for switching the signal processor to a state where the compensation signal is generated.
5. A hearing aid according to claim 4, where the switching means are adapted for automatically generating the compensation signal upon receiving the auxiliary input.
EP04797457.1A 2003-11-26 2004-11-18 Hearing aid with active noise canceling Active EP1690252B1 (en)

Applications Claiming Priority (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 (2)

Publication Number Publication Date
EP1690252A1 true EP1690252A1 (en) 2006-08-16
EP1690252B1 EP1690252B1 (en) 2017-07-12

Family

ID=34626321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04797457.1A Active EP1690252B1 (en) 2003-11-26 2004-11-18 Hearing aid with active noise canceling

Country Status (4)

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

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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
EP1931172B1 (en) * 2006-12-01 2009-07-01 Siemens Audiologische Technik GmbH Hearing aid with noise cancellation 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
DK2028877T3 (en) * 2007-08-24 2012-05-21 Oticon As 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
US10750293B2 (en) 2016-02-08 2020-08-18 Hearing Instrument Manufacture Patent Partnership Hearing augmentation systems and methods
US10390155B2 (en) 2016-02-08 2019-08-20 K/S Himpp Hearing augmentation systems and methods
US10341791B2 (en) 2016-02-08 2019-07-02 K/S Himpp Hearing augmentation systems and methods
US10284998B2 (en) 2016-02-08 2019-05-07 K/S Himpp Hearing augmentation systems and methods
CN108604454B (en) * 2016-03-16 2020-12-15 华为技术有限公司 Audio signal processing apparatus and input audio signal processing method
DE102020209906A1 (en) 2020-08-05 2022-02-10 Sivantos Pte. Ltd. Method of operating a hearing aid and hearing aid
DE102020209907A1 (en) 2020-08-05 2022-02-10 Sivantos Pte. Ltd. Method of operating a hearing aid and hearing aid

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Also Published As

Publication number Publication date
EP1690252B1 (en) 2017-07-12
CN1886782A (en) 2006-12-27
WO2005052911A1 (en) 2005-06-09
DK1690252T3 (en) 2017-10-09
CN1886782B (en) 2010-10-06

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