Analysis and design of spherical microphone arrays

被引:414
|
作者
Rafaely, B [1 ]
机构
[1] Ben Gurion Univ Negev, Dept Elect & Comp Engn, IL-84105 Beer Sheva, Israel
来源
关键词
plane-wave decomposition; sound-field analysis; spatial aliasing; spatial sampling; spherical Fourier transform; spherical microphone arrays;
D O I
10.1109/TSA.2004.839244
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Spherical microphone arrays have been recently studied for sound-field recordings, beamforming, and sound-field analysis which use spherical harmonics in the design. Although the microphone arrays and the associated algorithms were presented, no comprehensive theoretical analysis of performance was provided. This paper presents a spherical-harmonics-based design and analysis framework for spherical microphone arrays. In particular, alternative spatial sampling schemes for the positioning of microphones on a sphere are presented, and the errors introduced by finite number of microphones, spatial aliasing, inaccuracies in microphone positioning, and measurement noise are investigated both theoretically and by using simulations. The analysis framework can also provide a useful guide for the design and analysis of more general spherical microphone arrays which do not use spherical harmonics explicitly.
引用
收藏
页码:135 / 143
页数:9
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