Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8559
Title: A ray model for hard parallel noise barriers in high-rise cities
Authors: Li, KM
Kwok, MP
Law, MK
Issue Date: 2008
Publisher: Acoustical Society of America
Source: Journal of the Acoustical Society of America, 2008, v. 123, no. 1, p. 121-132 How to cite?
Journal: Journal of the Acoustical Society of America 
Abstract: A ray model is developed and validated for prediction of the insertion loss of hard parallel noise barriers placed in an urban environment either in front of a row of tall buildings or in a street canyon. The model is based on the theory of geometrical acoustics for sound diffraction at the edge of a barrier and multiple reflections by the ground, barrier and fa̧ade surfaces. It is crucial to include the diffraction and multiple reflection effects in the ray model as they play important roles in determining the overall sound pressure levels for receivers located between the fa̧ade and the near-side barrier. Comparisons of the ray model with a wave-based boundary element formulation show reasonably good agreement over a broad frequency range. Results of scale model experimental studies are also presented. It is demonstrated that the ray model agrees tolerably well with the scale model experimental data.
URI: http://hdl.handle.net/10397/8559
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.2804944
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