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Urban background no...
Urban background noise mapping : The multiple-reflection correction term
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- Hornikx, Maarten, 1980 (author)
- Eindhoven University of Technology,Technische Universiteit Eindhoven
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- Forssén, Jens, 1968 (author)
- Chalmers Tekniska Högskola,Chalmers tekniska högskola,Chalmers University of Technology
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- Botteldooren, Dick (author)
- Ghent University,Universiteit Gent,Ghent university
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- Van Renterghem, Timothy (author)
- Ghent University,Universiteit Gent,Ghent university
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- Wei, Weigang (author)
- Ghent University,Universiteit Gent,Ghent university
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- Ögren, Mikael (author)
- Statens väg- och transportforskningsinstitut,Miljö och trafikanalys, MTA,Statens Väg- och Transportforskningsinstitut (VTI),The Swedish National Road and Transport Research Institute (VTI)
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- Salomons, Erik (author)
- TNO Urban Environment and Health,Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek (TNO),Netherlands Organisation for Applied Scientific Research (TNO)
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: Acta Acoustica united with Acustica. - 1610-1928 .- 1861-9959. ; 100:2, s. 293-305
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Abstract
Subject headings
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- Mapping of road traffic noise in urban areas according to standardized engineering calculation methods systematically results in an underestimation of noise levels at areas shielded from direct exposure to noise, such as inner yards. In most engineering methods, road traffic lanes are represented by point sources and noise levels are computed utilizing point-to-point propagation paths. For a better prediction of noise levels in shielded urban areas, an extension of engineering methods by an attenuation term Acan has been proposed, including multiple reflections of the urban environment both in the source and in the receiver area.The present work has two main contributions for the ease of computing Acan. Firstly, it is shown by numerical calculations that Acan may be divided into independent source and receiver environment terms, As and Ar. Based on an equivalent free field analogy, the distance dependence of these terms may moreover be expressed analytically. Secondly, an analytical expression is proposed to compute As and Ar for 3D configurations from using 2D configurations only. The expression includes dependence of the street width-to-height ratio, the difference in building heights and the percentage of facade openings in the horizontal plane. For the expression to be valid, the source should be separated from the receiver environment by at least four times the street width.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Övrig annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Annan samhällsbyggnadsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Other Civil Engineering (hsv//eng)
Keyword
- Noise
- Measurement
- Urban area
- Calculation
- 15 Road: Environment
- 15 Road: Environment
Publication and Content Type
- ref (subject category)
- art (subject category)
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