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Spherical microphone array with multiple nulls for analysis of directional room impulse responses

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1 Author(s)
Rafaely, B. ; Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer Sheva

A spherical microphone array is presented which incorporates multiple nulls in the beampattern for analysis of directional room impulse responses. Improved performance is achieved compared to spherical arrays with regular beampatterns due to the ability to attenuate undesired room reflections. Formulation of the multiple-null spherical array processing is presented, both in the space and spherical harmonics domains. The paper concludes with experimental investigation using impulse response data measured in an auditorium.

Published in:

Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on

Date of Conference:

March 31 2008-April 4 2008