Abstract
Scale model experiments were executed for two concert halls and two opera houses which recently opened in Tokyo. Based on the geometrical acoustic analysis by using CAD model, effective room shapes were studied so as to minimize the extra labor at the scale model test. Then, 1:10 scale models made of wood and proper acoustical materials were constructed. Up-to-date digital signal processing technique was applied in order to improve the accuracy of the experiment. Also, several new ideas concerning the sound source, receivers, scale modeled seatings, and how to calibrate the air absorption were introduced, intended for the precise prediction of the room acoustical parameters. Thus, monaural parameters RT, EDT, C80, D, G, and ST, and binaural parameter IACC were measured in the scale models, and they were compared with those measured in real halls. The accuracy and problems of this method were discussed with the acoustical data found here.
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