2aAA5. The resonator system of controlling the reverberation time in an existing hall.

Session: Tuesday Morning, May 14

Time: 10:35

Author: Shigeo Hase
Location: Theatre Design Co., Ltd., 1-16-1 Shibata, Kita-ku, Osaka, 530 Japan
Author: Yoshihito Kobayashi
Location: Asahi Glass Sound Proof System Co., Ltd., Tokyo, 110 Japan


In this paper, the resonator system of controlling the reverberation time is examined in an existing hall with 500 seats and the room volume of 4160 m[sup 3]. The cavity of each chair with the volume of 0.012 m[sup 3] was utilized as a resonator. Four holes of a 30-mm diameter in the lower board of chairs can be opened or closed by a sliding plate. By use of such a system of chairs, the reverberation time at the low-frequency range in the hall could be controlled as: at 100 Hz: 1.93--1.58 s; at 125 Hz: 1.69--1.44 s; at 160 Hz: 1.54--1.36 s, and at 200 Hz: 1.52--1.45 s.

from ASA 131st Meeting, Indianapolis, May 1996