A Hybrid Model for Investigating the Effect of Scattering from Building Façade on Sound Propagation in Street Canyons

Applied Sciences

Jian Kang¹  Hui Ma¹  Boya Yu² 

[1] School of Architecture, Tianjin University, Weijin road 92, Tianjin 300072, China;School of architecture and Arts, Beijing Jiaotong University, No.3 Shangyuancun, Haidian District, Beijing 100044, China;

关键词: scattering reflection;    street canyon;    hybrid model;    full-scale measurement;   

DOI  :  10.3390/app9142803

来源: DOAJ

【 摘 要 】

Street canyons are basic components of modern cities. Sound propagation in streets has been proven to be significantly affected by reflections from building façades. In this paper, an iterative model combining acoustic radiosity and the image source method (IMCRI) is proposed to investigate the effect of diffuse reflections on sound propagation in urban street canyons. By applying image patches, this model calculates both specular reflected components and diffuse reflected components in every reflection. The accuracy of this model is then validated with full-scale measured data from five actual streets with different scattering conditions. Good agreements of sound pressure level and reverberation time are found between the IMCRI and the measurements. The performance of the IMCRI is found to be superior to those of the existing energy models, especially for the reverberation time simulation.

【 授权许可】

Unknown