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Conference Paper

Three-Dimensional Large-Scale Loudspeaker Array System Using High-Speed 1-Bit Signal for Immersive Sound Field Reproduction

Authors: Kurokawa, Kakeru,; Tsunokuni, Izumi; Ikeda, Yusuke; Osaka, Naotoshi; Oikawa, Yasuhiro

AES Conference: 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science · Paper EB1-11 · July 2018

Abstract

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.

Details

Published in
AES Conference: 2018 AES International Conference on Spatial Reproduction - Aesthetics and Science
Paper number
EB1-11
Publication date
July 6, 2018
Session subject
Sound Field Synthesis; Delta-sigma Data Converter; Massive Loudspeaker Array; FPGA
Affiliation
Tokyo Denki University; Adachi, Tokyo, Japan; Waseda University, Shinjuku, Tokyo, Japan (See document for exact affiliation information.)
Type
Conference Paper