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A hybrid model for investigating the effect of scattering from building façade on sound propagation in street canyons

Yu, B; Ma, H; Kang, J; (2019) A hybrid model for investigating the effect of scattering from building façade on sound propagation in street canyons. MDPI — Applied Sciences , 9 (14) , Article 2803. 10.3390/app9142803. Green open access

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Abstract

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.

Type: Article
Title: A hybrid model for investigating the effect of scattering from building façade on sound propagation in street canyons
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/app9142803
Publisher version: https://doi.org/10.3390/app9142803
Language: English
Additional information: © 2019 by the Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Keywords: scattering reflection, street canyon, hybrid model, full-scale measurement
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/10078936
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