Theory and design of compact hybrid microphone arrays on two-dimensional planes for three-dimensional soundfield analysis

Hanchi Chen, Thushara D. Abhayapala, Wen Zhang

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Soundfield analysis based on spherical harmonic decomposition has been widely used in various applications; however, a drawback is the three-dimensional geometry of the microphone arrays. In this paper, a method to design two-dimensional planar microphone arrays that are capable of capturing three-dimensional (3D) spatial soundfields is proposed. Through the utilization of both omni-directional and first order microphones, the proposed microphone array is capable of measuring soundfield components that are undetectable to conventional planar omni-directional microphone arrays, thus providing the same functionality as 3D arrays designed for the same purpose. Simulations show that the accuracy of the planar microphone array is comparable to traditional spherical microphone arrays. Due to its compact shape, the proposed microphone array greatly increases the feasibility of 3D soundfield analysis techniques in real-world applications.

Original languageEnglish
Pages (from-to)3081-3092
Number of pages12
JournalJournal of the Acoustical Society of America
Volume138
Issue number5
DOIs
StatePublished - 1 Nov 2015
Externally publishedYes

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