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Theory and design of high order sound field microphones using spherical microphone array

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Date

2002

Authors

Ward, Darren B
Abhayapala, Thushara

Journal Title

Journal ISSN

Volume Title

Publisher

Institute of Electrical and Electronics Engineers (IEEE Inc)

Abstract

A major problem in sound field reconstruction systems is how to record the higher order (> 1) harmonic components of a given sound field. Spherical harmonics analysis is used to establish theory and design of a higher order recording system, which comprises an array of small microphones arranged in a spherical configuration and associated signal processing. This result has implications to the advancement of future sound field reconstruction systems. An example of a third order system for operation over a 10:1 frequency range of 340 Hz to 3.4 kHz is given.

Description

Keywords

Keywords: Legendre function; Spherical microphone array; Acoustic arrays; Acoustic signal processing; Audio systems; Loudspeakers; Sound recording; Three dimensional; Two dimensional; Vectors; Microphones

Citation

URI

http://hdl.handle.net/1885/74969

Collections

ANU Research Publications

Source

International Conference on Acoustics, Speech and Signal Processing 2002

Type

Conference paper

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