【摘要】 中国传统戏场有不少是庭院式的。在这种顶面敞开的空间中,混响很少,声场基本上是非扩散的,故其声学性能与全封闭房间有很大不同。经典的室内声学例如赛宾混响公式在此不再适用。且由于缺失了大量来自顶面的反射声,使反射声序列的精细结构有很大变化,在仅仅表征声音衰变速率的混响时间参量中却反应不出来。致使虽具有与封闭房间相同3D混响时间的庭院空间中,其混响感可能明显不同。本文分析了庭院空间内声场的若干特征,对庭院式戏场音质作了初步探讨。更多还原

【Abstract】 The traditional Chinese theatre was often built with a courtyard. In such kind of space,the absence of a roof would mean little reverberation and non-diffused sound field. Acoustically the situation is quite different from that of any enclosed space. Therefore,the classic room acoustics,such as Sabine reverberation formula,would no longer be applicable here due to the lack of sound reflections from the ceiling. As the parameter of reverberation time T30 shows the decay rate only,it would not properly characterize the prominent change in the fine structure of the echogram, particularly for the case with a large reduction of reflections during the decay process. The sense of reverbrance in a courtyard space would differ noticeably from that of the equivalent 3D-T30 in an enclosed space. In this article,the author,based upon the characteristic analysis of the sound field in a courtyard space,presents a preliminary study on the acoustics of the courtyard theatres.更多还原