Combined inverse filtering and feedback control for robust equalization and distortion reduction in loudspeaker systems

Yusuke Kadowaki, Toshiya Samejima

Research output: Contribution to conferencePaper

Abstract

A method for the robust equalization and distortion reduction of loudspeakers is proposed. The proposed method adopts both an infinite impulse response (IIR) inverse filter and a feedback controller. The feedback controller 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.

Original languageEnglish
Publication statusPublished - Jan 1 2016
Event141st Audio Engineering Society International Convention 2016, AES 2016 - Los Angeles, United States
Duration: Sep 29 2016Oct 2 2016

Other

Other141st Audio Engineering Society International Convention 2016, AES 2016
CountryUnited States
CityLos Angeles
Period9/29/1610/2/16

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Modelling and Simulation
  • Acoustics and Ultrasonics

Cite this

Kadowaki, Y., & Samejima, T. (2016). Combined inverse filtering and feedback control for robust equalization and distortion reduction in loudspeaker systems. Paper presented at 141st Audio Engineering Society International Convention 2016, AES 2016, Los Angeles, United States.