The physically control a high-precision or wide-area sound ?eld requires a highly complex reproduction system owing to the large number of loudspeakers required. Previously, we developed a 256-ch planar loudspeaker system with simple electrical circuits by using high-speed 1-bit signals. In this study, we proposed a 320-ch three-dimensional loudspeaker system by extending the previous developed system. Introducing ARM/FPGA SoC has made it possible to control a large number of audio signals via Linux OS. To investigate a reproducible sound ?eld using the proposed system, a preliminary experiment was conducted by simulation of sound ?eld reproduction with Wave Field Synthesis and Near-Field Compensated Higher Order Ambisonics.

Authors: Kurokawa, Kakeru,; Tsunokuni, Izumi; Ikeda, Yusuke; Osaka, Naotoshi; Oikawa, Yasuhiro
Affiliations: Tokyo Denki University; Adachi, Tokyo, Japan; Waseda University, Shinjuku, Tokyo, Japan(See document for exact affiliation information.)
AES Conference: 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science (July 2018)
Paper Number: EB1-11
Publication Date: July 30, 2018
Session Subject: Sound Field Synthesis; Delta-sigma Data Converter; Massive Loudspeaker Array; FPGA

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