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Amplitude Matching for Multizone Sound Field Control

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posted on 07.02.2022, 03:41 authored by Takumi Abe, Shoichi KoyamaShoichi Koyama, Natsuki Ueno, Hiroshi Saruwatari
A multizone sound field control method, called amplitude matching, is proposed. The objective of amplitude matching is to synthesize a desired amplitude (or magnitude) distribution over a target region with multiple loudspeakers, whereas the phase distribution is arbitrary. Most of the current multizone sound field control methods are intended to synthesize a specific sound field including phase or to control acoustic potential energy inside the target region. In amplitude matching, a specific desired amplitude distribution can be set, ignoring sound propagation directions. Although the optimization problem of amplitude matching does not have a closed-form solution, our proposed algorithm based on the alternating direction method of multipliers (ADMM) allows us to accurately and efficiently synthesize the desired amplitude distribution. We also introduce the differential-norm penalty for a time-domain filter design with a small filter length. The experimental results indicated that the proposed method outperforms current multizone sound field control methods in terms of accuracy of the synthesized amplitude distribution.

Funding

JST PRESTO Grant Number JPMJPR18J4

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Email Address of Submitting Author

koyama.shoichi@ieee.org

ORCID of Submitting Author

0000-0003-2283-0884

Submitting Author's Institution

The University of Tokyo

Submitting Author's Country

Japan

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