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Summary: ICSV14
Cairns · Australia
9-12 July, 2007
LIMITATIONS AND ERROR ANALYSIS OF SPHERICAL
MICROPHONE ARRAYS
Thushara D. Abhayapala1
, Michael C. T. Chan2
1
Research School of Information Sciences and Engineering
Australian National University
Canberra ACT 0200 Australia
Thushara.Abhayapala@anu.edu.au
Abstract
There has been a strong interest in theory and design of spherical microphone arrays in recent
years due to their possible use in recording directional sounds for surround sound creation. The
theory of such arrays is based on decomposition of sound fields to spherical harmonics which
are the natural basis functions for valid sound fields over three dimensional space. However, due
to physical size of practical spherical arrays, number of extractable spherical harmonic compo-
nents are limited to the third order. This paper investigates the various design issues including
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