Technical Program

Paper Detail

Paper:SP-P10.1
Session:Topics in Speech Enhancement
Time:Wednesday, May 19, 15:30 - 17:30
Presentation: Poster
Topic: Speech Processing: Speech Enhancement
Title: SPHERICAL HARMONIC ANALYSIS OF EQUALIZATION IN A REVERBERANT ROOM
Authors: Terence Betlehem; Australian National University 
 Thushara Abhayapala; Australian National University 
Abstract: In this paper, we investigate the performance of acoustic equalization in reverberant environments. We first highlight an efficient general representation of a sound field using spherical harmonics. We then use this representation to develop a concise closed-form expression for robustness of equalization to sensor movement. This expression is used (i) to characterize equalization performance for a general class of non-isotropic sound fields and (ii) to quantify the improvementsto equalizer robustness that can be obtained by using a directional microphone. The approach used here does not use any of the assumptions of statistical acoustics, but instead exploits the inherent properties of a sound field as described by the wave equation.
 
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