TY - CONF T1 - Flexible layout and optimal cancellation of the orthonormality error for spherical microphone arrays T2 - Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on Y1 - 2004 A1 - Zhiyun Li A1 - Duraiswami, Ramani A1 - Grassi,E. A1 - Davis, Larry S. KW - array KW - audio KW - base; KW - beamforming; KW - cable KW - cancellation KW - correction; KW - error KW - flexible KW - harmonics; KW - higher KW - layout; KW - microphone KW - microphones; KW - mounting KW - optimization; KW - order KW - orthonormality KW - outlets; KW - processing; KW - signal KW - spherical KW - surface; AB - This paper describes an approach to achieving a flexible layout of microphones on the surface of a spherical microphone array for beamforming. Our approach achieves orthonormality of spherical harmonics to higher order for relatively distributed layouts. This gives great flexibility in microphone layout on the spherical surface. One direct advantage is that it makes it much easier to build a real world system, such as those with cable outlets and a mounting base, with minimal effects on the performance. Simulation results are presented. JA - Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on VL - 4 M3 - 10.1109/ICASSP.2004.1326758 ER -