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Technical Program

Paper Detail

Paper:	AE-L2.6
Session:	Loudspeaker and Microphone Array Processing
Time:	Wednesday, May 17, 15:40 - 16:00
Presentation:	Lecture
Topic:	Audio and Electroacoustics: Loudspeaker and Microphone Array Signal Processing
Title:	Frequency Independent Flexible Spherical Beamforming via RBF Fitting
Authors:	Arkady Yerukhimovich, Ramani Duraiswami, Nail Gumerov, Dmitry Zotkin, University of Maryland, United States
Abstract:	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.