WO2003015460A3 - Sound processing system including wave generator that exhibits arbitrary directivity and gradient response - Google Patents

Sound processing system including wave generator that exhibits arbitrary directivity and gradient response Download PDF

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Publication number
WO2003015460A3
WO2003015460A3 PCT/EP2002/009031 EP0209031W WO03015460A3 WO 2003015460 A3 WO2003015460 A3 WO 2003015460A3 EP 0209031 W EP0209031 W EP 0209031W WO 03015460 A3 WO03015460 A3 WO 03015460A3
Authority
WO
WIPO (PCT)
Prior art keywords
processing system
system including
sound processing
present
wave generator
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/EP2002/009031
Other languages
French (fr)
Other versions
WO2003015460A2 (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 EP02767372A priority Critical patent/EP1415503A2/en
Publication of WO2003015460A2 publication Critical patent/WO2003015460A2/en
Publication of WO2003015460A3 publication Critical patent/WO2003015460A3/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H04R29/005—Microphone arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • 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 apparent 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/EP2002/009031 2001-08-10 2002-08-12 Sound processing system including wave generator that exhibits arbitrary directivity and gradient response Ceased WO2003015460A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02767372A EP1415503A2 (en) 2001-08-10 2002-08-12 Sound processing system including wave generator that exhibits arbitrary directivity and gradient response

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92778301A 2001-08-10 2001-08-10
US09/927,783 2001-08-10

Publications (2)

Publication Number Publication Date
WO2003015460A2 WO2003015460A2 (en) 2003-02-20
WO2003015460A3 true WO2003015460A3 (en) 2003-11-20

Family

ID=25455249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/009031 Ceased WO2003015460A2 (en) 2001-08-10 2002-08-12 Sound processing system including wave generator that exhibits arbitrary directivity and gradient response

Country Status (2)

Country Link
EP (1) EP1415503A2 (en)
WO (1) WO2003015460A2 (en)

Families Citing this family (7)

* 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
US7127076B2 (en) 2003-03-03 2006-10-24 Phonak Ag Method for manufacturing acoustical devices and for reducing especially wind disturbances
EP1339256B1 (en) * 2003-03-03 2017-12-27 Sonova AG Method for manufacturing acoustical devices and for reducing wind disturbances
US7688985B2 (en) 2004-04-30 2010-03-30 Phonak Ag Automatic microphone matching
EP1489883A3 (en) * 2004-04-30 2005-06-15 Phonak Ag Automatic microphone matching
US9357307B2 (en) 2011-02-10 2016-05-31 Dolby Laboratories Licensing Corporation Multi-channel wind noise suppression system and method
CN112259068B (en) * 2020-10-21 2023-04-11 上海协格空调工程有限公司 Active noise reduction air conditioning system and noise reduction control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831458A2 (en) * 1996-09-18 1998-03-25 Nippon Telegraph And Telephone Corporation Method and apparatus for separation of sound source, program recorded medium therefor, method and apparatus for detection of sound source zone; and program recorded medium therefor
US5978490A (en) * 1996-12-27 1999-11-02 Lg Electronics Inc. Directivity controlling apparatus
US6023514A (en) * 1997-12-22 2000-02-08 Strandberg; Malcolm W. P. System and method for factoring a merged wave field into independent components
US6317703B1 (en) * 1996-11-12 2001-11-13 International Business Machines Corporation Separation of a mixture of acoustic sources into its components

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831458A2 (en) * 1996-09-18 1998-03-25 Nippon Telegraph And Telephone Corporation Method and apparatus for separation of sound source, program recorded medium therefor, method and apparatus for detection of sound source zone; and program recorded medium therefor
US6317703B1 (en) * 1996-11-12 2001-11-13 International Business Machines Corporation Separation of a mixture of acoustic sources into its components
US5978490A (en) * 1996-12-27 1999-11-02 Lg Electronics Inc. Directivity controlling apparatus
US6023514A (en) * 1997-12-22 2000-02-08 Strandberg; Malcolm W. P. System and method for factoring a merged wave field into independent components

Also Published As

Publication number Publication date
EP1415503A2 (en) 2004-05-06
WO2003015460A2 (en) 2003-02-20

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