5aAA8. Investigation on relationships between speech intelligibility on Japanese language and STI for the design of the sound system of an auditorium.

Session: Friday Morning, December 6

Time: 10:00

Author: Motoo Komoda
Location: Nagata Acoust., Inc., Minami-Shinjuku-Hoshino Bldg. 8F, 5-23-13, Sendagaya, Shibuya-ku, Tokyo, 151 Japan
Author: Matsumi Takeuchi
Location: Matsushita Communication Industrial Co., Ltd., 600, Saedo-cho, Tsuzuki-ku, Yokohama, 224 Japan
Author: Katsuhiro Umekai
Location: Victor Co. of Japan, Ltd., 58-7, Shinmei-cho, Yokosuka, Kanagawa, 239 Japan


In order to clarify the applicability of STI as a parameter in sound system design, a working group was organized in JATET (Theatre and Entertainment Technology Association, Japan) in 1993. It has conducted a series of investigations on speech intelligibility in various aspects. This report summarizes the results of investigations on the following items: (1) STI round-robin tests with six measuring systems; (2) relationships between the intelligibility in listening tests and measured STI under the following different conditions---(a) acoustical conditions of the room, (b) types of loudspeakers, (c) listening levels, (d) frequency characteristics of signal sources, with and without microphone---(3) prediction of STI by computer simulation; and (4) a listening test by an auralization system.

ASA 132nd meeting - Hawaii, December 1996