Xiang Ning, Jing Yun, Bockman Alexander C
Graduate Program in Architectural Acoustics, School of Architecture, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
J Acoust Soc Am. 2009 Sep;126(3):1187-98. doi: 10.1121/1.3168507.
Recent application of coupled-room systems in performing arts spaces has prompted active research on sound fields in these complex geometries. This paper applies a diffusion-equation model to the study of acoustics in coupled-rooms. Acoustical measurements are conducted on a scale-model of two coupled-rooms. Using the diffusion model and the experimental results the current work conducts in-depth investigations on sound pressure level distributions, providing further evidence supporting the valid application of the diffusion-equation model. Analysis of the results within the Bayesian framework allows for quantification of the double-slope characteristics of sound-energy decays obtained from the diffusion-equation numerical modeling and the experimental measurements. In particular, Bayesian decay analysis confirms sound-energy flux modeling predictions that time-dependent sound-energy flows in coupled-room systems experience feedback in the form of energy flow-direction change across the aperture connecting the two rooms in cases where the dependent room is more reverberant than the source room.
耦合房间系统最近在演艺空间中的应用促使人们对这些复杂几何形状中的声场展开积极研究。本文将扩散方程模型应用于耦合房间声学的研究。在两个耦合房间的比例模型上进行声学测量。利用扩散模型和实验结果，当前工作对声压级分布进行了深入研究，为扩散方程模型的有效应用提供了进一步的证据。在贝叶斯框架内对结果进行分析，能够对从扩散方程数值建模和实验测量中获得的声能衰减的双斜率特性进行量化。特别是，贝叶斯衰减分析证实了声能通量建模的预测，即在从属房间比源房间更具混响的情况下，耦合房间系统中随时间变化的声能流会以能量流方向在连接两个房间的孔径处发生变化的形式经历反馈。
