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Amplitude Matching for Multizone Sound Field Control
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  • Takumi Abe ,
  • Shoichi Koyama ,
  • Natsuki Ueno ,
  • Hiroshi Saruwatari
Takumi Abe
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Shoichi Koyama
The University of Tokyo, The University of Tokyo

Corresponding Author:[email protected]

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Natsuki Ueno
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Hiroshi Saruwatari
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Abstract

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.
2023Published in IEEE/ACM Transactions on Audio, Speech, and Language Processing volume 31 on pages 656-669. 10.1109/TASLP.2022.3231715