厅堂音质仿真的可靠性

对仿真和实测厅堂脉冲响应的相似程度进行了分析,比较了不同脉冲响应与干信号卷积所得听音片断的全频和中频有效持续时间;通过对听音片断全频和中频滤波后的主观听音试验,探讨厅堂音质仿真的可靠度.结果表明:仿真脉冲响应与实测脉冲响应的差异并不明显;在高频带和低频带,仿真可靠度较低.对全频段仿真尚存在较大的误差,全频段音质评价仍需应用实际厅堂脉冲响应卷积进行.

Reliability of Simulation of Auditorium Acoustics

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.