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Application of near-field optimum microphone arrays to hands-free mobile telephony

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2 Author(s)
Ryan, J.G. ; Inst. for Microstructural Sci., Nat. Res. Council of Canada, Ottawa, Ont., Canada ; Goubran, R.A.

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.

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:52 ,  Issue: 2 )

Date of Publication:

March 2003

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