SE9402088D0 - Microphone system - Google Patents

Microphone system

Info

Publication number
SE9402088D0
SE9402088D0 SE9402088A SE9402088A SE9402088D0 SE 9402088 D0 SE9402088 D0 SE 9402088D0 SE 9402088 A SE9402088 A SE 9402088A SE 9402088 A SE9402088 A SE 9402088A SE 9402088 D0 SE9402088 D0 SE 9402088D0
Authority
SE
Sweden
Prior art keywords
signal
signals
noise
input
arrangement
Prior art date
Application number
SE9402088A
Other languages
Swedish (sv)
Other versions
SE9402088L (en
SE502888C2 (en
Inventor
Sven Nordebo
Sven Nordholm
Ingvar Claesson
Original Assignee
Volvo Ab
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 Volvo Ab filed Critical Volvo Ab
Priority to SE9402088A priority Critical patent/SE502888C2/en
Publication of SE9402088D0 publication Critical patent/SE9402088D0/en
Priority to JP8502045A priority patent/JPH10501668A/en
Priority to PCT/SE1995/000718 priority patent/WO1995034983A1/en
Priority to EP95922851A priority patent/EP0765562A1/en
Priority to AU27594/95A priority patent/AU2759495A/en
Publication of SE9402088L publication Critical patent/SE9402088L/en
Publication of SE502888C2 publication Critical patent/SE502888C2/en

Links

Classifications

    • 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
    • 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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • 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
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • G10L2021/02166—Microphone arrays; Beamforming
    • 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
    • H04R2201/403—Linear arrays of transducers

Abstract

The invention relates to an adaptive microphone arrangement with one or more microphones (MP1, ..., MPn) comprising a signal detecting arrangement for detecting target input signals, a signal forming arrangement and signals storing means. The input signals comprise a calibration signal (m1, ..., mn) and a second noise signal (N1, ..., Nn) wherein the calibration input signal is recorded and stored in a storing means (2). The signal forming arrangement comprises a first signal forming means (4) and a second signal forming means (5) wherein the first signal forming means (4) comprises adapting means for treating the sum of the calibration signal and a noise signal to provide filtering coefficients which then are copied to and used in the second signal forming means (5) on the target-noise input signal and wherein the adapting signals and the target-noise signals are input under essentially the same conditions.
SE9402088A 1994-06-14 1994-06-14 Adaptive microphone device and method for adapting to an incoming target noise signal SE502888C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9402088A SE502888C2 (en) 1994-06-14 1994-06-14 Adaptive microphone device and method for adapting to an incoming target noise signal
JP8502045A JPH10501668A (en) 1994-06-14 1995-06-13 Adaptive microphone device and incoming target noise signal adaptation method
PCT/SE1995/000718 WO1995034983A1 (en) 1994-06-14 1995-06-13 Adaptive microphone arrangement and method for adapting to an incoming target-noise signal
EP95922851A EP0765562A1 (en) 1994-06-14 1995-06-13 Adaptive microphone arrangement and method for adapting to an incoming target-noise signal
AU27594/95A AU2759495A (en) 1994-06-14 1995-06-13 Adaptive microphone arrangement and method for adapting to an incoming target-noise signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9402088A SE502888C2 (en) 1994-06-14 1994-06-14 Adaptive microphone device and method for adapting to an incoming target noise signal

Publications (3)

Publication Number Publication Date
SE9402088D0 true SE9402088D0 (en) 1994-06-14
SE9402088L SE9402088L (en) 1995-12-15
SE502888C2 SE502888C2 (en) 1996-02-12

Family

ID=20394386

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9402088A SE502888C2 (en) 1994-06-14 1994-06-14 Adaptive microphone device and method for adapting to an incoming target noise signal

Country Status (5)

Country Link
EP (1) EP0765562A1 (en)
JP (1) JPH10501668A (en)
AU (1) AU2759495A (en)
SE (1) SE502888C2 (en)
WO (1) WO1995034983A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5796819A (en) * 1996-07-24 1998-08-18 Ericsson Inc. Echo canceller for non-linear circuits
AUPO714197A0 (en) 1997-06-02 1997-06-26 University Of Melbourne, The Multi-strategy array processor
US6430295B1 (en) * 1997-07-11 2002-08-06 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for measuring signal level and delay at multiple sensors
US6023514A (en) * 1997-12-22 2000-02-08 Strandberg; Malcolm W. P. System and method for factoring a merged wave field into independent components
DE19801389A1 (en) 1998-01-16 1999-07-22 Cit Alcatel Echo cancellation method with adaptive FIR filters
US6549627B1 (en) * 1998-01-30 2003-04-15 Telefonaktiebolaget Lm Ericsson Generating calibration signals for an adaptive beamformer
DE19812697A1 (en) * 1998-03-23 1999-09-30 Volkswagen Ag Method and device for operating a microphone arrangement, in particular in a motor vehicle
EP0974329A3 (en) * 1998-07-02 2001-09-12 Altura Leiden Holding B.V. Control apparatus for sanitary installations
US6594367B1 (en) * 1999-10-25 2003-07-15 Andrea Electronics Corporation Super directional beamforming design and implementation
DE60010457T2 (en) 2000-09-02 2006-03-02 Nokia Corp. Apparatus and method for processing a signal emitted from a target signal source in a noisy environment
US7274794B1 (en) * 2001-08-10 2007-09-25 Sonic Innovations, Inc. Sound processing system including forward filter that exhibits arbitrary directivity and gradient response in single wave sound environment
US20030161485A1 (en) * 2002-02-27 2003-08-28 Shure Incorporated Multiple beam automatic mixing microphone array processing via speech detection
CN1682566A (en) * 2002-09-13 2005-10-12 皇家飞利浦电子股份有限公司 Calibrating a first and a second microphone
US8031881B2 (en) * 2007-09-18 2011-10-04 Starkey Laboratories, Inc. Method and apparatus for microphone matching for wearable directional hearing device using wearer's own voice
US8223988B2 (en) * 2008-01-29 2012-07-17 Qualcomm Incorporated Enhanced blind source separation algorithm for highly correlated mixtures
US10244333B2 (en) * 2016-06-06 2019-03-26 Starkey Laboratories, Inc. Method and apparatus for improving speech intelligibility in hearing devices using remote microphone
CN106710603B (en) * 2016-12-23 2019-08-06 云知声（上海）智能科技有限公司 Utilize the audio recognition method and system of linear microphone array

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956867A (en) * 1989-04-20 1990-09-11 Massachusetts Institute Of Technology Adaptive beamforming for noise reduction

Also Published As

Publication number Publication date
WO1995034983A1 (en) 1995-12-21
JPH10501668A (en) 1998-02-10
EP0765562A1 (en) 1997-04-02
SE9402088L (en) 1995-12-15
SE502888C2 (en) 1996-02-12
AU2759495A (en) 1996-01-05

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