CA2406754A1 - Method and apparatus for noise reduction, particularly in hearing aids - Google Patents

Method and apparatus for noise reduction, particularly in hearing aids

Info

Publication number
CA2406754A1
CA2406754A1 CA 2406754 CA2406754A CA2406754A1 CA 2406754 A1 CA2406754 A1 CA 2406754A1 CA 2406754 CA2406754 CA 2406754 CA 2406754 A CA2406754 A CA 2406754A CA 2406754 A1 CA2406754 A1 CA 2406754A1
Authority
CA
Canada
Prior art keywords
hearing
noise
loss
speech
compression
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
CA 2406754
Other languages
French (fr)
Other versions
CA2406754C (en
Inventor
Robert Brennan
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.)
Semiconductor Components Industries LLC
Original Assignee
Dspfactory Ltd.
Robert Brennan
Emma Mixed Signal C.V.
On Semiconductor Trading Ltd.
Semiconductor Components Industries, Llc
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 Dspfactory Ltd., Robert Brennan, Emma Mixed Signal C.V., On Semiconductor Trading Ltd., Semiconductor Components Industries, Llc filed Critical Dspfactory Ltd.
Priority to CA 2406754 priority Critical patent/CA2406754C/en
Priority claimed from CA002286268A external-priority patent/CA2286268C/en
Publication of CA2406754A1 publication Critical patent/CA2406754A1/en
Application granted granted Critical
Publication of CA2406754C publication Critical patent/CA2406754C/en
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
    • H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • 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
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing

Abstract

A hearing aid includes noise reduction, and addresses the problem that, in noisy conditions, it is difficult for hearing impaired individuals to hear. Under light noise conditions, conventional hearing aids amplify the input signal sufficiency to overcome the hearing loss. For a typical sloping hearing loss where there is a loss in high frequency hearing sensitivity, the amount of boost (or gain) rises with frequency. Most frequently, the loss in sensitivity is only for low-level signals; high level signals are affective minimally or not al all. A compression hearing aid is able to compensate by automatically lowering the gain as the input signal level rises. This compression action is usually comprised under noisy conditions. In general, hearing aids are of lesser benefit under noisy conditions since both noise and speech are boosted together when what is really required is a reduction of the noise relative to the speech. A noise reduction algorithm with the dual purpose of enhancing speech relative to noise and also providing a relatively clean signal for the compression circuitry is described.
CA 2406754 1998-04-16 1998-04-16 Method and apparatus for noise reduction, particularly in hearing aids Expired - Lifetime CA2406754C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2406754 CA2406754C (en) 1998-04-16 1998-04-16 Method and apparatus for noise reduction, particularly in hearing aids

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2,286,268 1998-04-16
CA 2406754 CA2406754C (en) 1998-04-16 1998-04-16 Method and apparatus for noise reduction, particularly in hearing aids
CA002286268A CA2286268C (en) 1997-04-16 1998-04-16 Method and apparatus for noise reduction, particularly in hearing aids

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002286268A Division CA2286268C (en) 1997-04-16 1998-04-16 Method and apparatus for noise reduction, particularly in hearing aids

Publications (2)

Publication Number Publication Date
CA2406754A1 true CA2406754A1 (en) 1998-10-22
CA2406754C CA2406754C (en) 2009-06-30

Family

ID=4164378

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2406754 Expired - Lifetime CA2406754C (en) 1998-04-16 1998-04-16 Method and apparatus for noise reduction, particularly in hearing aids

Country Status (1)

Country Link
CA (1) CA2406754C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619926A1 (en) * 2004-07-21 2006-01-25 Phonak Ag Method and system for noise suppression in inductive receivers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9830925B2 (en) * 2014-10-22 2017-11-28 GM Global Technology Operations LLC Selective noise suppression during automatic speech recognition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619926A1 (en) * 2004-07-21 2006-01-25 Phonak Ag Method and system for noise suppression in inductive receivers

Also Published As

Publication number Publication date
CA2406754C (en) 2009-06-30

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Legal Events

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EEER Examination request
MKEX Expiry

Effective date: 20180416