An equalization model is presented that seeks optimal solutions to wide area low-frequency sound reproduction in closed acoustic spaces. The methodology improves upon conventional wisdom by incorporating a generalized subwoofer array where individual frequency dependent loudspeaker polar responses are described by complex spherical harmonic frequency dependent functions. Multi-point system identification is performed using 3-dimensional finite-difference time-domain simulation with optimization applied to seek global equalization represented by a set of orthogonal transfer functions applied to each spherical harmonic of each subwoofer within the array. The system is evaluated within a 3-dimensional virtual acoustic space using both time and frequency domain metrics.

Authors: Hill, Adam J.; Hawksford, Malcolm O.
Affiliation: University of Essex, Colchester, UK
AES Convention: 128 (May 2010) Paper Number: 8074
Publication Date: May 1, 2010 Import into BibTeX
Subject: Loudspeakers and Headphones
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=15371

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