Frequency Independent Flexible Spherical Beamforming Via Rbf Fitting

TitleFrequency Independent Flexible Spherical Beamforming Via Rbf Fitting
Publication TypeConference Papers
Year of Publication2006
AuthorsYerukhimovich A, Duraiswami R, Gumerov NA, Zotkin DN
Conference Name2006 IEEE International Conference on Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings
Date Published2006/05//
ISBN Number1-4244-0469-X
Keywordsacoustic signal processing, array signal processing, band-limited radial basis functions, Computer science, Educational institutions, Eigenvalues and eigenfunctions, Equations, Frequency, frequency independent beamformer weights, frequency independent flexible spherical beamforming, microphone arrays, Nails, Position measurement, RBF fitting, Robustness, sound analysis, spherical array data, spherical microphone array

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