Analysis and design of spherical microphone arrays
Analysis and design of spherical microphone arrays
复制标题
DOI：
10.1109/tsa.2004.839244
复制
发表时间：
2005-01-01
期刊：
影响因子：
--
通讯作者：
Rafaely, B
中科院分区：
文献类型：
--
作者：
Rafaely, B
球形麦克风阵列最近已经被研究用于声场记录、波束形成和声场分析，其在设计中使用球谐函数。虽然麦克风阵列和相关的算法，没有提供全面的理论分析的性能。本文提出了一种基于球谐函数的球形麦克风阵列的设计和分析框架。特别是，替代空间采样方案的麦克风在一个球体上的定位，和有限数量的麦克风，空间混叠，麦克风定位的不准确性，和测量噪声引入的误差进行了研究，理论上和使用模拟。该分析框架还可以为不明确使用球谐函数的更一般的球形麦克风阵列的设计和分析提供有用的指导。
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.