窑洞式古戏场声环境仿真研究

Simulation of Acoustic Environment in Traditional Cave-Dwelling Theatrical Stages

参考山西超山庙窑洞式古戏台的体型、结构和体积,构建了5种古戏台计算模型.模型的计算空间为14. 42m×15. 68m×5. 88m.考虑古戏台墙体材料,模型边界由刚性边界和完全匹配层(PML)吸收边界构成.利用时域有限差分法,通过Matlab编程,计算了所构建的5种古戏台模型中几个不同受声点的脉冲响应,进而进行了频域分析.结果显示,窑洞式古戏台增加了声音的清晰度、丰满度、混响感等,还对部分频率的声音起到了一定的扩声作用.

Referring to the shape,structure and volume of an ancient cave-dwelling stage in the Chaoshan Temple of Shanxi Province,five traditional theatrical stage models have been built.The computation space is 14.42 m×15.68 m×5.88 m.Considering the wall s materials in the ancient stages,the models’boundaries consist of rigid boundary and perfectly matched layer(PML)absorbing boundary conditions.Through the finite-difference time-domain method by using the Matlab software,impulse responses of the receiving points in the five models have been calculated,which have been in spectral analysis.The results show that traditional cave-dwelling theatrical stages can strengthen the sound s clarity,fullness and reverberation and so on,which can achieve sound reinforcement at some frequencies.