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Journal Article

A Tool for Room Acoustic Measurement

Authors: Kawakami, Fukushi; Niimi, Koji; Yamaguchi, Kiminori

Journal of the Audio Engineering Society · Volume 29 · Issue 10 · pp. 739–748 · October 1981

Abstract

A portable tool was developed for accurate field measurements of reverberation time and frequency characteristics of a given enclosure. This tool, including a CRT and a tone-burst generator, is called AS-1. It displays computed results, such as the ensemble average reverberation curves associated with calculated RT(60), D(50) and EDT(10). Use of a microprocessor and its peripherals permits the on-line and real-time measurement of these parameters, ordinarily obtained on a large off-line computer. The functions and system architecture of the AS-1 are described, showing data obtained in actual measurements and the digital signal-processing technology used. Because of its averaging and noise suppression capability, the AS-1 is also applicable to absorption coefficient measurements in a reverberation room and to tests of audio equipment, requiring only a loudspeaker and a microphone, and no other equipment such as a sweep generator and level recorder.

Details

Publication
Journal of the Audio Engineering Society
Volume
29
Issue
10
Pages
739–748
Publication date
October 6, 1981
Affiliation
Nippon Gakki Co., Ltd., Hamamatsu, Japan (See document for exact affiliation information.)
Type
Journal Article