对预测教堂内早期声能量衰变的延时耦合空间模型的改进(英文)  

Development of a Delayed Coupled Room Model for the Prediction of the Performance of Early Energy Decay in Churches

作　　者：褚轶景[1] 麦卓明[1] 

机构地区：[1]香港理工大学屋宇设备工程系

出　　处：《华南理工大学学报（自然科学版）》2007年第B10期25-27,共3页Journal of South China University of Technology(Natural Science Edition)

摘　　要：采用脉冲激励响应的方法对两种不同类型的教堂早期声能量衰变过程进行了研究.结果表明,在Barron模型中耦合效应比声源与接收点的距离影响更大.文中还提出了延时耦合空间模型.将几何声学引入统计声学来检测扩散场条件,同时通过对声音从声源传播到每个扩散场子空间的延时,修正了关于脉冲宽度的初始条件.基于耦合空间的理论预测与实际测量结果较为一致.To study the performance of early energy decay in churches, acoustical measurements under an impulse excitation were conducted in a Protestant church and a Catholic church in Hong Kong. The results show that the coupling effect is more prominent than the effect of the source-receiver distance in Barron＇s model. Moreover, a delayed coupled-room model was developed. It introduces geometrical acoustics into statistical acoustics to verify a diffused sound field condition, and modifies the initial condition in the impulse duration by introducing a delayed time interval for sound propagated from the source to achieve diffuse sound fields in each subspace. The predicted results of the coupled room model agree well with the measured ones.

关 键 词：早期声能量衰变 延时耦合空间模型 脉冲激励响应 

分 类 号：TU112[建筑科学—建筑理论]