Visualizing the performance of large-aperture microphone arrays

Authors:
H. F. Silverman;W. R. Patterson
Affiliations:
Div. of Eng., Brown Univ., Providence, RI, USA;-
Venue:
ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 02
Year:
1999

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Musical-noise analysis in methods of integrating microphone array and spectral subtraction based on higher-order statistics

EURASIP Journal on Advances in Signal Processing - Special issue on microphone array speech processing

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Abstract

The use of arrays of microphones having a large number of elements (hundreds) is now in place in research laboratories, and will soon be practical for real applications. In rooms of auditorium or conference size, a large number of microphones will virtually always imply that the aperture will be large compared to the focal distance. This requires understanding the volume selectivity of irregular, widely-distributed sets of microphones. In this paper, several pictures of the beamforming performance of large-aperture distributions of microphones are presented. The purpose is to illustrate some of the pitfalls in large-aperture microphone-array design.