WO2001095666A3 - Adaptive directional noise cancelling microphone system - Google Patents

Adaptive directional noise cancelling microphone system Download PDF

Info

Publication number
WO2001095666A3
WO2001095666A3 PCT/SG2000/000080 SG0000080W WO0195666A3 WO 2001095666 A3 WO2001095666 A3 WO 2001095666A3 SG 0000080 W SG0000080 W SG 0000080W WO 0195666 A3 WO0195666 A3 WO 0195666A3
Authority
WO
WIPO (PCT)
Prior art keywords
noise cancelling
directional microphone
directions
microphone system
adaptive directional
Prior art date
Application number
PCT/SG2000/000080
Other languages
French (fr)
Other versions
WO2001095666A2 (en
Inventor
Ming Zhang
Hui Lan
Wee Ser
Original Assignee
Univ Nanyang
Ming Zhang
Hui Lan
Wee Ser
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 Univ Nanyang, Ming Zhang, Hui Lan, Wee Ser filed Critical Univ Nanyang
Priority to PCT/SG2000/000080 priority Critical patent/WO2001095666A2/en
Priority to AU2000251208A priority patent/AU2000251208A1/en
Publication of WO2001095666A2 publication Critical patent/WO2001095666A2/en
Publication of WO2001095666A3 publication Critical patent/WO2001095666A3/en

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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/326—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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
    • G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/01—Noise reduction using microphones having different directional characteristics

Landscapes

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

Abstract

The present invention provides a noise cancelling microphone system which comprises an omni-directional microphone (1), a normal (e.g., cardioid-type) directional microphone (2), preamplifiers (3, 4), analogue-to-digital (A/D) converters (5, 6), an adaptive filtering circuit (7), a digital-to-analogue (D/A) converter (8) and a case (11) specially designed for the system. The omni-directional microphone (1) can receive the sounds from any directions with a same or very similar gain. The directional microphone (2) can receive sounds from the first directions, except the second directions, with a similar gain. The two microphones are combined together with a closely acoustically-coupled way.
PCT/SG2000/000080 2000-06-05 2000-06-05 Adaptive directional noise cancelling microphone system WO2001095666A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SG2000/000080 WO2001095666A2 (en) 2000-06-05 2000-06-05 Adaptive directional noise cancelling microphone system
AU2000251208A AU2000251208A1 (en) 2000-06-05 2000-06-05 Adaptive directional noise cancelling microphone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2000/000080 WO2001095666A2 (en) 2000-06-05 2000-06-05 Adaptive directional noise cancelling microphone system

Publications (2)

Publication Number Publication Date
WO2001095666A2 WO2001095666A2 (en) 2001-12-13
WO2001095666A3 true WO2001095666A3 (en) 2002-11-28

Family

ID=20428823

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2000/000080 WO2001095666A2 (en) 2000-06-05 2000-06-05 Adaptive directional noise cancelling microphone system

Country Status (2)

Country Link
AU (1) AU2000251208A1 (en)
WO (1) WO2001095666A2 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7142677B2 (en) * 2001-07-17 2006-11-28 Clarity Technologies, Inc. Directional sound acquisition
US6917688B2 (en) 2002-09-11 2005-07-12 Nanyang Technological University Adaptive noise cancelling microphone system
US7106876B2 (en) * 2002-10-15 2006-09-12 Shure Incorporated Microphone for simultaneous noise sensing and speech pickup
US7092529B2 (en) 2002-11-01 2006-08-15 Nanyang Technological University Adaptive control system for noise cancellation
US7212642B2 (en) 2002-12-20 2007-05-01 Oticon A/S Microphone system with directional response
EP1695590B1 (en) 2003-12-01 2014-02-26 Wolfson Dynamic Hearing Pty Ltd. Method and apparatus for producing adaptive directional signals
AU2004310722B9 (en) * 2003-12-01 2009-02-19 Cirrus Logic International Semiconductor Limited Method and apparatus for producing adaptive directional signals
US7970564B2 (en) * 2006-05-02 2011-06-28 Qualcomm Incorporated Enhancement techniques for blind source separation (BSS)
US7876906B2 (en) 2006-05-30 2011-01-25 Sonitus Medical, Inc. Methods and apparatus for processing audio signals
EP2078301A1 (en) * 2006-09-28 2009-07-15 France Telecom Noise and distortion reduction in a forward-type structure
US8954324B2 (en) 2007-09-28 2015-02-10 Qualcomm Incorporated Multiple microphone voice activity detector
US8175871B2 (en) 2007-09-28 2012-05-08 Qualcomm Incorporated Apparatus and method of noise and echo reduction in multiple microphone audio systems
US8223988B2 (en) 2008-01-29 2012-07-17 Qualcomm Incorporated Enhanced blind source separation algorithm for highly correlated mixtures
WO2008104446A2 (en) 2008-02-05 2008-09-04 Phonak Ag Method for reducing noise in an input signal of a hearing device as well as a hearing device
US8295506B2 (en) 2008-07-17 2012-10-23 Sonitus Medical, Inc. Systems and methods for intra-oral based communications
US8208656B2 (en) * 2009-06-23 2012-06-26 Fortemedia, Inc. Array microphone system including omni-directional microphones to receive sound in cone-shaped beam
EP2454891B1 (en) 2009-07-15 2014-02-26 Widex A/S Method and processing unit for adaptive wind noise suppression in a hearing aid system and a hearing aid system
JP5649655B2 (en) 2009-10-02 2015-01-07 ソニタス メディカル， インコーポレイテッド Intraoral device for transmitting sound via bone conduction
WO2012139230A1 (en) * 2011-04-14 2012-10-18 Phonak Ag Hearing instrument
US9042992B2 (en) 2012-08-31 2015-05-26 University Of Florida Research Foundation, Inc. Protecting airways
WO2014036425A1 (en) 2012-08-31 2014-03-06 University Of Florida Research Foundation, Inc. Controlling coughing and swallowing
US10397711B2 (en) * 2015-09-24 2019-08-27 Gn Hearing A/S Method of determining objective perceptual quantities of noisy speech signals
KR102606286B1 (en) 2016-01-07 2023-11-24 삼성전자주식회사 Electronic device and method for noise control using electronic device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0569216A1 (en) * 1992-05-08 1993-11-10 Sony Corporation Microphone apparatus
JPH06292291A (en) * 1993-03-30 1994-10-18 Sony Corp Microphone equipment
EP0652686A1 (en) * 1993-11-05 1995-05-10 AT&T Corp. Adaptive microphone array
EP0756407A2 (en) * 1995-07-24 1997-01-29 Matsushita Electric Industrial Co., Ltd. Noise controlled type handset

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0569216A1 (en) * 1992-05-08 1993-11-10 Sony Corporation Microphone apparatus
JPH06292291A (en) * 1993-03-30 1994-10-18 Sony Corp Microphone equipment
EP0652686A1 (en) * 1993-11-05 1995-05-10 AT&T Corp. Adaptive microphone array
EP0756407A2 (en) * 1995-07-24 1997-01-29 Matsushita Electric Industrial Co., Ltd. Noise controlled type handset

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 01 28 February 1995 (1995-02-28) *

Also Published As

Publication number Publication date
AU2000251208A1 (en) 2001-12-17
WO2001095666A2 (en) 2001-12-13

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