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WO2003015459A3 - Sound processing system that exhibits arbitrary gradient response - Google Patents

Sound processing system that exhibits arbitrary gradient response Download PDF

Info

Publication number
WO2003015459A3
WO2003015459A3 PCT/EP2002/009030 EP0209030W WO03015459A3 WO 2003015459 A3 WO2003015459 A3 WO 2003015459A3 EP 0209030 W EP0209030 W EP 0209030W WO 03015459 A3 WO03015459 A3 WO 03015459A3
Authority
WO
WIPO (PCT)
Prior art keywords
processing system
present
sound processing
microphones
processor
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.)
Ceased
Application number
PCT/EP2002/009030
Other languages
French (fr)
Other versions
WO2003015459A2 (en
Inventor
Erik W Rasmussen
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.)
Rasmussen Digital APS
Original Assignee
Rasmussen Digital APS
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 Rasmussen Digital APS filed Critical Rasmussen Digital APS
Priority to EP02767371A priority Critical patent/EP1415506A2/en
Publication of WO2003015459A2 publication Critical patent/WO2003015459A2/en
Publication of WO2003015459A3 publication Critical patent/WO2003015459A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H04R29/005—Microphone arrays
    • H04R29/006—Microphone matching
    • 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
    • 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
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • General 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)

Abstract

A sound processing system including at least one microphone, an audio processor, and at least one output device. The audio processor includes an analog beamformer, a microphone equalizer, and an apparent incidence processor. Two different embodiments of the apparant incidence processor are disclosed, that is, a wave generation method and a forward filtering method. Both embodiments use the same principles to estimate the properties of the individual waves of the sound field. With the present invention, it is possible to implement arbitrary directivity responses using a small number of microphones only, that is, two or three microphones. The present invention offers improved noise reduction also for environments with many independent noise sources. Furthermore, the present invention works for signals and noises with arbitrary statistics.
PCT/EP2002/009030 2001-08-10 2002-08-12 Sound processing system that exhibits arbitrary gradient response Ceased WO2003015459A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02767371A EP1415506A2 (en) 2001-08-10 2002-08-12 Sound processing system that exhibits arbitrary gradient response

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92822901A 2001-08-10 2001-08-10
US09/928,229 2001-08-10

Publications (2)

Publication Number Publication Date
WO2003015459A2 WO2003015459A2 (en) 2003-02-20
WO2003015459A3 true WO2003015459A3 (en) 2003-11-20

Family

ID=25455914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/009030 Ceased WO2003015459A2 (en) 2001-08-10 2002-08-12 Sound processing system that exhibits arbitrary gradient response

Country Status (2)

Country Link
EP (1) EP1415506A2 (en)
WO (1) WO2003015459A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US7415117B2 (en) 2004-03-02 2008-08-19 Microsoft Corporation System and method for beamforming using a microphone array
GB0720473D0 (en) 2007-10-19 2007-11-28 Univ Surrey Accoustic source separation
US9357307B2 (en) 2011-02-10 2016-05-31 Dolby Laboratories Licensing Corporation Multi-channel wind noise suppression system and method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540795A1 (en) * 1995-11-02 1997-05-07 Deutsche Telekom Ag Speaker location method using microphone array
EP0795851A2 (en) * 1996-03-15 1997-09-17 Kabushiki Kaisha Toshiba Method and system for microphone array input type speech recognition
EP0883325A2 (en) * 1997-06-02 1998-12-09 The University Of Melbourne Multi-strategy array processor
WO1999045741A2 (en) * 1998-03-02 1999-09-10 Mwm Acoustics, Llc Directional microphone system
EP0942628A2 (en) * 1998-03-13 1999-09-15 Siemens Hearing Instruments, Inc. Microphone assembly and calibration method
US6160757A (en) * 1997-09-10 2000-12-12 France Telecom S.A. Antenna formed of a plurality of acoustic pick-ups
EP1065909A2 (en) * 1999-06-29 2001-01-03 Alexander Goldin Noise canceling microphone array
EP1091615A1 (en) * 1999-10-07 2001-04-11 Zlatan Ribic Method and apparatus for picking up sound

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540795A1 (en) * 1995-11-02 1997-05-07 Deutsche Telekom Ag Speaker location method using microphone array
EP0795851A2 (en) * 1996-03-15 1997-09-17 Kabushiki Kaisha Toshiba Method and system for microphone array input type speech recognition
EP0883325A2 (en) * 1997-06-02 1998-12-09 The University Of Melbourne Multi-strategy array processor
US6160757A (en) * 1997-09-10 2000-12-12 France Telecom S.A. Antenna formed of a plurality of acoustic pick-ups
WO1999045741A2 (en) * 1998-03-02 1999-09-10 Mwm Acoustics, Llc Directional microphone system
EP0942628A2 (en) * 1998-03-13 1999-09-15 Siemens Hearing Instruments, Inc. Microphone assembly and calibration method
EP1065909A2 (en) * 1999-06-29 2001-01-03 Alexander Goldin Noise canceling microphone array
EP1091615A1 (en) * 1999-10-07 2001-04-11 Zlatan Ribic Method and apparatus for picking up sound

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KELLERMANN W: "A SELF-STEERING DIGITAL MICROPHONE ARRAY", SPECTRAL ESTIMATION AUDIO AND ELECTROACOUSTICS. TORONTO, APRIL, 14 - 17, 1991, INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH & SIGNAL PROCESSING. ICASSP, NEW YORK, IEEE, US, vol. 5 CONF. 16, 14 May 1991 (1991-05-14), pages 3581 - 3584, XP000242750, ISBN: 0-7803-0003-3 *

Also Published As

Publication number Publication date
EP1415506A2 (en) 2004-05-06
WO2003015459A2 (en) 2003-02-20

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