TY - GEN
T1 - Generalized framework for spherical microphone arrays
T2 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
AU - Abhayapala, Thushara D.
PY - 2008
Y1 - 2008
N2 - This paper provides a generalized framework to decompose a sourcefield into its spatial and frequency components using a spherical microphone array. Spherical arrays are used to decompose a soundfield into spherical harmonics which are the natural basis functions for space over directions. This paper extends this theory by including basis functions in frequency to decompose a soundfield into spatial-frequency components. Specifically, we use spherical Bessel functions as a set of basis in frequency. The paper also shows how to avoid numerical ill-conditioning inherited in open spherical arrays at frequencies corresponding to Bessel zeros.
AB - This paper provides a generalized framework to decompose a sourcefield into its spatial and frequency components using a spherical microphone array. Spherical arrays are used to decompose a soundfield into spherical harmonics which are the natural basis functions for space over directions. This paper extends this theory by including basis functions in frequency to decompose a soundfield into spatial-frequency components. Specifically, we use spherical Bessel functions as a set of basis in frequency. The paper also shows how to avoid numerical ill-conditioning inherited in open spherical arrays at frequencies corresponding to Bessel zeros.
KW - Beamforming
KW - Fourier spherical Bessel series
KW - Sound field
KW - Spatial decomposition
KW - Spherical microphone array
UR - http://www.scopus.com/inward/record.url?scp=51449085379&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2008.4518848
DO - 10.1109/ICASSP.2008.4518848
M3 - Conference contribution
SN - 1424414849
SN - 9781424414840
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 5268
EP - 5271
BT - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
Y2 - 31 March 2008 through 4 April 2008
ER -