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WO2003015458A3 - Systeme de traitement de son comprenant un filtre de retroaction faisant preuve d'une directivite arbitraire et d'une reponse aux gradients dans un environnement sonore a ondes multiples - Google Patents

Systeme de traitement de son comprenant un filtre de retroaction faisant preuve d'une directivite arbitraire et d'une reponse aux gradients dans un environnement sonore a ondes multiples Download PDF

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Publication number
WO2003015458A3
WO2003015458A3 PCT/EP2002/009029 EP0209029W WO03015458A3 WO 2003015458 A3 WO2003015458 A3 WO 2003015458A3 EP 0209029 W EP0209029 W EP 0209029W WO 03015458 A3 WO03015458 A3 WO 03015458A3
Authority
WO
WIPO (PCT)
Prior art keywords
processing system
system including
present
sound processing
multiple wave
Prior art date
Application number
PCT/EP2002/009029
Other languages
English (en)
Other versions
WO2003015458A2 (fr
Inventor
Erik W Rasmussen
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 EP02767370A priority Critical patent/EP1415502A2/fr
Publication of WO2003015458A2 publication Critical patent/WO2003015458A2/fr
Publication of WO2003015458A3 publication Critical patent/WO2003015458A3/fr

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

L'invention porte sur un système de traitement de son comprenant au moins un microphone, un processeur audio et au moins un dispositif de sortie. Le processeur audio comporte un module de formation de faisceau analogique, un égaliseur pour microphone et un processeur d'incidence apparente. L'invention prévoit deux modes de réalisation du processeur d'incidence apparente différents, à savoir un procédé de génération d'onde et un procédé de filtrage de rétroaction. Les deux modes de réalisation se prévalent des mêmes principes pour estimer les propriétés des ondes individuelles du champ sonore. Il est possible, par voie de conséquence, de mettre en oeuvre des réponses de directivité arbitraire à l'aide d'un petit nombre de microphones uniquement, notamment deux ou trois microphones. L'invention permet de réduire considérablement le bruit dans des environnements ayant de nombreuses sources de bruit indépendantes. Par ailleurs, l'invention trouve une application avec les signaux et les bruits présentant des statistiques arbitraires.
PCT/EP2002/009029 2001-08-10 2002-08-12 Systeme de traitement de son comprenant un filtre de retroaction faisant preuve d'une directivite arbitraire et d'une reponse aux gradients dans un environnement sonore a ondes multiples WO2003015458A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02767370A EP1415502A2 (fr) 2001-08-10 2002-08-12 Systeme de traitement de son comprenant un filtre de retroaction faisant preuve d'une directivite arbitraire et d'une reponse aux gradients dans un environnement sonore a ondes multiples

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92778401A 2001-08-10 2001-08-10
US09/927,784 2001-08-10

Publications (2)

Publication Number Publication Date
WO2003015458A2 WO2003015458A2 (fr) 2003-02-20
WO2003015458A3 true WO2003015458A3 (fr) 2003-10-23

Family

ID=25455251

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/009029 WO2003015458A2 (fr) 2001-08-10 2002-08-12 Systeme de traitement de son comprenant un filtre de retroaction faisant preuve d'une directivite arbitraire et d'une reponse aux gradients dans un environnement sonore a ondes multiples

Country Status (2)

Country Link
EP (1) EP1415502A2 (fr)
WO (1) WO2003015458A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4671303B2 (ja) * 2005-09-02 2011-04-13 国立大学法人北陸先端科学技術大学院大学 マイクロホンアレイ用ポストフィルタ
WO2008061534A1 (fr) * 2006-11-24 2008-05-29 Rasmussen Digital Aps Traitement de signaux utilisant un filtre spatial
US9467775B2 (en) 2011-09-02 2016-10-11 Gn Netcom A/S Method and a system for noise suppressing an audio signal
CN117896655B (zh) * 2024-03-14 2024-07-30 深圳前海深蕾半导体有限公司 均衡分频器电路和终端设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057960A (en) * 1961-03-13 1962-10-09 Bell Telephone Labor Inc Normalized sound control system
US5978490A (en) * 1996-12-27 1999-11-02 Lg Electronics Inc. Directivity controlling apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057960A (en) * 1961-03-13 1962-10-09 Bell Telephone Labor Inc Normalized sound control system
US5978490A (en) * 1996-12-27 1999-11-02 Lg Electronics Inc. Directivity controlling apparatus

Also Published As

Publication number Publication date
WO2003015458A2 (fr) 2003-02-20
EP1415502A2 (fr) 2004-05-06

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