DocumentCode :
1199048
Title :
Application of near-field optimum microphone arrays to hands-free mobile telephony
Author :
Ryan, James G. ; Goubran, Rafik A.
Author_Institution :
Inst. for Microstructural Sci., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Volume :
52
Issue :
2
fYear :
2003
fDate :
3/1/2003 12:00:00 AM
Firstpage :
390
Lastpage :
400
Abstract :
This paper discusses the application of fixed microphone arrays to speech pickup in mobile telephone applications. Array optimization techniques are used to design two broad-band beamformers for speech pickup in the near field. The first beamformer provides optimum gain for spatially incoherent noise while the second beamformer provides optimum gain in spherically isotropic noise. Array performance was measured using vehicular noise recorded under realistic driving conditions. Results obtained are in agreement with theoretical predictions for a spherically isotropic noise field and are comparable to previously reported results obtained using adaptive beamforming algorithms.
Keywords :
acoustic noise; array signal processing; microphones; mobile handsets; array optimization techniques; broad-band beamformers; driving conditions; fixed microphone arrays; hands-free mobile telephony; near-field optimum microphone arrays; spatially incoherent noise; speech pickup; spherically isotropic noise; spherically isotropic noise field; Acoustic noise; Acoustic propagation; Array signal processing; Background noise; Design optimization; Microphone arrays; Noise cancellation; Signal processing algorithms; Speech enhancement; Telephony;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2003.808803
Filename :
1198585
Link To Document :
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