3pAA10. Scale model experiment for the acoustical design of a church.

Session: Wednesday Afternoon, December 4

Time: 4:15


Author: Hikari Mukai
Location: Dept. of Architecture, Meiji Univ., Higasimita 1-1-1, Tama-ku, Kawasaki, Kanagawa, Japan
Author: Fumiaki Satoh
Location: Chiba Inst. of Technol., Tsudamuma 2-17-1, Narashino Chiba, Japan
Author: Hiroo Yano
Location: Chiba Inst. of Technol., Tsudamuma 2-17-1, Narashino Chiba, Japan
Author: Hideki Tachibana
Location: Tokyo Univ., 7-22-1 Roppongi, Minato-ku, Tokyo, Japan

Abstract:

In a church, speech intelligibility is a very important condition together with the reverberance for musical activities. In order to realize these two incompatible conditions, public address (P. A.) systems are often used to improve speech intelligibility. In the acoustical design of St. Ignatius Church in Tokyo, a 1/20-scale model experiment is being made, in which the acoustic conditions, including the effect of the P.A. system, are investigated by applying the hybrid simulation technique. As for the sound sources to measure impulse responses, four types of spark-discharge impulse sources---a simple omnidirectional one and three directional ones which simulate human heads and two types of horn-type loudspeakers---have been developed. In order to investigate the effect of the P. A. system, impulse responses measured under various configurations are convolved with dry sources (speech and music) and judged by means of a subjective hearing test.


ASA 132nd meeting - Hawaii, December 1996