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Effects of source side roughness on the acoustical performance of a traffic noise berm

Hill, Toby; Taherzadeh, Shahram; Bashir, Imran and Attenborough, Keith (2011). Effects of source side roughness on the acoustical performance of a traffic noise berm. In: Forum Acusticum 2011, 26 June-01 July 2011, Aalborg, Denmark.

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Abstract

Surface roughness introduced on to horizontal ground between a noise source and receiver has previously been demonstrated to provide additional attenuation for sound near grazing incidence. Roughness-enhanced ground effect has been shown to depend on the relative source-receiver geometry. In most studies of the effects of surface roughness there has been line of site between source and receiver [see for example “Diffraction assisted ground effect” Bashir, Attenborough, Hill and Taherzadeh, Proc. 2010 ASA, Cancun] whereas for potential applications this may not be the case. Numerical calculations and data indicate the benefits of applying specific surface roughness profiles to large-scale acoustic obstructions such as an earth berm. Boundary element calculations have been used to investigate the attenuation of sound by the scattering of surface/creeping waves from surface roughness. The influence of different roughness cross-sections and distributions on the attenuation of noise from standard road traffic sources are discussed [work supported by European Community FP7 project number 234306].

Item Type: Conference Item
Copyright Holders: European Acoustics Association
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEuropean Community FP7 project number 234306
Extra Information: Published in proceedings of Forum Acusticum 2011 / Danish Acoustical Society (editors). Published by EAA (European Acoustics Association, 2011, pp 887-892. ISBN (Electronic) 978-84-694-1520-7, ISSN (Electronic) 2221-3767
Keywords: environmental noise
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
Interdisciplinary Research Centre: eSTEeM
Item ID: 29898
Depositing User: Toby Hill
Date Deposited: 01 Nov 2011 16:15
Last Modified: 20 Mar 2014 14:45
URI: http://oro.open.ac.uk/id/eprint/29898
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