A method for the robust equalization and distortion reduction of loudspeakers is proposed. The proposed method adopts both an IIR-type inverse filter and a feedback control. The feedback control based on model-following control theory is used to force a loudspeaker to move as a linear time-invariant (LTI) system. Accordingly, we expect the inverse filter that is specifically designed for the LTI system to work correctly. Furthermore, nonlinear distortion of a loudspeaker is expected to be reduced. Computer simulation shows that the proposed method achieves more robust equalization of a loudspeaker than inverse filtering alone. In addition, the proposed method simultaneously reduces nonlinear distortion of the loudspeaker.

Authors: Kadowaki, Yusuke; Samejima, Toshiya
Affiliation: Kyushu University, Kyushu, Japan
AES Convention: 141 (September 2016) Paper Number: 9608
Publication Date: September 20, 2016 Import into BibTeX
Subject: Acoustics, Transducers, and Audio
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=18412

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