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Frequency Independent Flexible Spherical Beamforming Via Rbf Fitting

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4 Author(s)
Yerukhimovich, A. ; Perceptual Interfaces & Reality Lab., Maryland Univ., College Park, MD ; Duraiswami, R. ; Gumerov, N.A. ; Zotkin, D.N.

We describe a new method for sound analysis using a spherical microphone array without the use of quadrature over the sphere. Quadrature based solutions are very sensitive to the placement of microphones on the sphere, needing measurements to be made at exactly the quadrature positions. We propose to use fitting with band-limited radial basis functions (RBFs) rather than quadrature. Our approach results in frequency independent beamformer weights for flexibly placed microphone locations. Results are demonstrated using both synthetic and real spherical array data

Published in:

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on  (Volume:5 )

Date of Conference:

14-19 May 2006