Robust Sound-Reproduction-System Design Against The Head Movement

WESTPRAC VII 2000: the 7th West Pacific Regional Acoustics Conference, October 3-5, 2000, Kumamoto, Japan.This paper proposes a new sound field reproduction system. Multi-channel sound field reproduction is one of the most promising methods to realize a sound reproduction system robustly against a head movement. Multi-channel sound field reproduction can reproduce the same acoustic field as the recording area by using several controlled points. However, such sound field reproduction systems have not been developed due to poor understanding of the behavior of multiple channel systems. In this paper, we first investigate the accuracy of the reproduced sound of a multi-channel sound reproduction system. In particular we investigate the optimal loudspeaker arrangement and the optimal number of controlled points using computer simulation. We also construct a multi-channel sound field reproduction system which can reproduce the sound within the wide reproduced area around the listener's head. As a result, good sound localization is realized by arranging loudspeakers around the controlled field