Abstract:

:In order to investigate the simulation reliability of auditorium acoustics, the similarity level of the simulated and the measured impulse responses was analyzed, and the effective durations of the music episode deriving from the convolution between various impulse responses and dry sound signals in the full and the middle frequency ranges were compared. Moreover, some subjective audio tests were conducted for the music episode after the filtering in the full and the middle frequency ranges. The results show that there is no obvious difference between the simulated and the measured impulse responses, and that the simulations in high and low frequency ranges are both of low reliability. It is thus concluded that, as error-free acoustic simulation in the full frequency range cannot be achieved as yet, the convolution of actual impulse responses is still an effective way to acoustic evaluation.

Key words: acoustic simulation, impulse response, autocorrelation function, effective duration, reliability