Comparative evaluation of ray tracing and diffusion equation modeling in room acoustics design of subway stations

Date
2020-02
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Source Title
Acoustics Australia
Print ISSN
0814-6039
Electronic ISSN
Publisher
Springer
Volume
48
Issue
1
Pages
93 - 105
Language
English
Type
Article
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Abstract

Due to their disproportionate geometries and uneven distribution of sound, the interior sound field analysis of subway stations has always been challenging. The field necessitates reliable tools for real-case design applications, while the research and discussions on the topic are still ongoing. This study compares two major room acoustics simulation approaches, namely ray tracing and diffusion equation modeling (DEM) in order to assist future acoustical designs of subway stations. Two cases of Istanbul Metropolitan metro lines are selected, namely station BAG with a circular cross section and station USK with rectangular cross section. The reverberation time and relative sound pressure level results from field tests are compared with those obtained by the ray tracing and DEM. The results emphasized the validity as well as limitations of each method over discussed metrics with given geometric layouts and material characteristics of the subway stations.

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Keywords
Subway station, Acoustic design, Diffusion equation, Ray-tracing simulation, Acoustical comfort, Istanbul metro system
Citation
Published Version (Please cite this version)