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

Wang, C; Ma, H; Kang, J; (2019) Parameter study of sound energy distribution in cuboid extra-large spaces. Building Simulation , 12 (5) pp. 835-846. 10.1007/s12273-019-0545-1. Green open access

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Abstract

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 exponentially. The predicted difference between with and without consideration of air absorption increases linearly with the source-receiver distance.

Type: Article
Title: Parameter study of sound energy distribution in cuboid extra-large spaces
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s12273-019-0545-1
Publisher version: https://doi.org/10.1007/s12273-019-0545-1
Language: English
Additional information: © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).
Keywords: extra-large space, energy distribution, image method, parameter study, sound absorption
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/10074017
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