Parameter study of sound energy distribution in cuboid extra-large spaces

作     者：Chao Wang Hui Ma Jian Kang 

作者机构：School of Architecture Tianjin University Tianjin 300072 China School of Architecture Tianjin University Tianjin 300072 China UCL Institute for Environmental Design and Engineering The Bartlett University Colege London (UCL) Central House 14 Upper Woburn Place London WC1H 0NN UK 

出 版 物：《建筑模拟（英文版）》 (Building Simulation)

年 卷 期：2019年第12卷第5期

页      面：835-846页

核心收录：

学科分类：08[工学] 0813[工学-建筑学] 081301[工学-建筑历史与理论] 

基　　金：the National Natural Science Foundation of China under Grant numbers 51378139 and 51478303. We also acknowledge Python Software Foundation and Continuum Analytics for their open-source software Python and Anaconda 

主　　题：extra-large space energy distribution image method parameter study sound absorption 

摘      要：The aim of this paper is to explore the sound energy distribution in cuboid extra-large spaces. The surface absorption and height are studied as the parameters using the image method. Air absorption is also discussed in this paper. The results show that the difficulty of reducing the noise increases with the increasing volume in extra-large spaces. Even if the ratio between the equivalent absorption area and the total surface is kept constant, the efficiency of noise reduction decreases by approximately 21％ in this study. The absorption areas on the floor and the walls have a better performance on noise reduction than that on the ceiling. When the initial height of an extra-large space with general ratio of three dimensions is continuously halved, the variation in the noise level is close to a fixed value, and when the initial height continuously doubled, the noise level decreased approximately exponentialy. The predicted difference between with and without consideration of air absorption increases linearly with the source-receiver distance.