| Title |
Using an 1:50 Scale Model for Predicting Acoustical Characteristics of Concert hall |
| Keywords |
Concert hall ; Acoustical design ; Scale model ; Computer simulation ; Air absorption |
| Abstract |
In acoustical design of a concert hall, the acoustical model test which has the potential to enable effective prediction of acoustical characteristics of auditoria, is able to accommodate the complex behavior when sound hits finite size of obstacles. On the other hand, computer programs, though they offer a powerful modeling aid, cannot yet accommodate the wave nature of sound such as diffusion and diffraction. During the small-sized acoustical model test, using nitrogen is necessary to control the air absorption and the effect of humidity at the high frequencies. Generally, 1/8“ microphone is used to receive the high frequency sound. In this research, the 1/50 scale model of the concert hall was tested, and its acoustical characteristics were analyzed. By comparing and analyzing the result with the result of computer simulation, the usefulness of the 1/50 scale model test was investigated. As a result, it was found that the distribution condition of the acoustical factors of both methods was highly analogous in each seat and octave band. However, in case of comparing the acoustical factors, the values of C80 and D50 showed differences, which may be caused by sound diffusion and diffraction phenomena. |