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An Estimation Method of Parameters for Closed-box Loudspeaker System

Rika NAKAO, Yoshinobu KAJIKAWA, Yasuo NOMURA

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Summary :

In this paper, we propose a method that uses Simulated Annealing (SA) to estimate the linear and nonlinear parameters of a closed-box loudspeaker system for implementing effective Mirror filters. The nonlinear parameters determined by W. Klippel's method are sometimes inaccurate and imaginary. In contrast, the proposed method can estimate the parameters with satisfactory accuracy due to its use of SA; the resulting impedance and displacement characteristics match those of an actual equivalent loudspeaker. A Mirror filter designed around these parameters can well compensate the nonlinear distortions of the loudspeaker system. Experiments demonstrate that the method can reduce the levels of nonlinear distortion by 5 dB to 20 dB compared to the before compensation condition.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E91-A No.10 pp.3006-3013
Publication Date
2008/10/01
Publicized
Online ISSN
1745-1337
DOI
10.1093/ietfec/e91-a.10.3006
Type of Manuscript
PAPER
Category
Engineering Acoustics

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