DK1785007T3 - Lavfrekvent fasematchning til mikrofoner - Google Patents

Lavfrekvent fasematchning til mikrofoner Download PDF

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Publication number
DK1785007T3
DK1785007T3 DK05774069.8T DK05774069T DK1785007T3 DK 1785007 T3 DK1785007 T3 DK 1785007T3 DK 05774069 T DK05774069 T DK 05774069T DK 1785007 T3 DK1785007 T3 DK 1785007T3
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DK
Denmark
Prior art keywords
microphone
microphones
filter
amplitude
correction filter
Prior art date
Application number
DK05774069.8T
Other languages
English (en)
Inventor
Karsten Bo Rasmussen
Kim Spetzler Petersen
Ulrik Kjems
Original Assignee
Oticon As
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 Oticon As filed Critical Oticon As
Application granted granted Critical
Publication of DK1785007T3 publication Critical patent/DK1785007T3/da

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Classifications

    • 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
    • H04R29/006—Microphone matching

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  • 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)

Claims (3)

1. Kommunikationsanordning, der har en første mikrofon med en første respons og en anden mikrofon med en anden respons, hvor, for at matche mikrofonydeevnen adaptivt i forbindelse med faseresponsen i frekvensområdet under 500Hz, et korrektionsfilter i form af et første ordens 11R filter implementeres, og hvor amplituden af overføringsfunktionen for korrektionsfilteret er i det mindste cirka det inverse af et forhold mellem de to mikrofonamplituder, hvor hver af den første og den anden mikrofon er efterfulgt af en analog-digitalomformer og et båndpasfilter eller en FFT, og hvor udgangssignalet fra båndpasfiltrene eller FFT’erne fødes ind i en mikrofonforskydningsdetektor, der igen tilvejebringer et indgangssignal til 11R korrektionsfilteret for den første mikrofon.
2. Kommunikationsanordning ifølge krav 1, hvor fasen matches ved anvendelse af korrektionsfilteret som en konsekvens af amplitudematchningen.
3. Kommunikationsanordning ifølge krav 1 eller 2, hvor anordningen er en batteridrevet kropsbåret, fortrinsvis hovedbåret, anordning, for eksempel et høreapparat eller et telefon headset.
DK05774069.8T 2004-08-24 2005-08-22 Lavfrekvent fasematchning til mikrofoner DK1785007T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200401280A DK200401280A (da) 2004-08-24 2004-08-24 Lavfrekvens fase matchning til mikrofoner
PCT/EP2005/054117 WO2006021555A1 (en) 2004-08-24 2005-08-22 Low frequency phase matching for microphones

Publications (1)

Publication Number Publication Date
DK1785007T3 true DK1785007T3 (da) 2014-02-24

Family

ID=35063278

Family Applications (2)

Application Number Title Priority Date Filing Date
DK200401280A DK200401280A (da) 2004-08-24 2004-08-24 Lavfrekvens fase matchning til mikrofoner
DK05774069.8T DK1785007T3 (da) 2004-08-24 2005-08-22 Lavfrekvent fasematchning til mikrofoner

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DK200401280A DK200401280A (da) 2004-08-24 2004-08-24 Lavfrekvens fase matchning til mikrofoner

Country Status (6)

Country Link
US (1) US20070258597A1 (da)
EP (1) EP1785007B1 (da)
CN (1) CN101006747B (da)
AU (1) AU2005276428B2 (da)
DK (2) DK200401280A (da)
WO (1) WO2006021555A1 (da)

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Also Published As

Publication number Publication date
AU2005276428A1 (en) 2006-03-02
CN101006747A (zh) 2007-07-25
AU2005276428B2 (en) 2010-09-16
EP1785007A1 (en) 2007-05-16
CN101006747B (zh) 2012-07-04
WO2006021555A1 (en) 2006-03-02
US20070258597A1 (en) 2007-11-08
DK200401280A (da) 2006-02-25
EP1785007B1 (en) 2013-11-20

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