The prediction of noise levels L10 due to road traffic

Delany, Mary E.; Harland, D G; Hood, R A; Scholes, W.E.

doi:10.1016/0022-460x(76)90057-2

Cited by 60 publications

(25 citation statements)

References 10 publications

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“…The effect of a facade of a building behind the reception point will increase the noise level [4]. Measurements performed at 1 m from an unbroken brick surface indicate an increase of 2.3 dB in measured noise level.…”

Section: Methodsmentioning

confidence: 99%

“…The basic parameters for the assessment of road traffic noise can be: the quantity of vehicles, i.e. the flow of vehicles, speed at which vehicles travel, existence of barriers in the immediate vicinity of road, surface covering the road, road gradient, distance from the traffic lane [4]. The importance of trucks and buses in contributing to high levels of noise was proved [5].…”

Section: Methodsmentioning

confidence: 99%

“…Constant C varies between 7.5 and 11.5, for different types of flow, urban conditions and gradients [4]. A general value of C=10 is accepted by the most researchers [6].…”

Section: Methodsmentioning

confidence: 99%

“…For trucks, it is 2.2 dB and 1.6 dB for busses [8]. Delany et al accept that there is an interaction between speed and percentage of heavy vehicles [4]. They identify two speed regions: above 50 Km/h where most traffic will operate under fairly free flow conditions, whilst below this speed the majority of the situations will not be freely flowing.…”

Section: Methodsmentioning

confidence: 99%

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Urban Noise Modelling in Boka Kotorska Bay

Nikolić¹,

Nikolić²,

Emilija³

et al. 2014

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Constant C varies between 7.5 and 11.5, for different types of flow, urban conditions and gradients [4]. A general value of C=10 is accepted by the most researchers [6].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Urban Noise Modelling in Boka Kotorska Bay

Nikolić¹,

Nikolić²,

Emilija³

et al. 2014

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“…1. This geometry is essentially based around a road traffic scenario with buildings along the roadside for which the horizontal source-reflector distance of 14.5 m is similar to a reference distance used by Delany et al [10] for the prediction of road traffic noise. A point source was assumed to be at a height of 0.5 m above the ground; note that this height is commonly assumed for a line source used to represent a road traffic source.…”

Section: Introductionmentioning

confidence: 99%

Sound fields near building facades – comparison of finite and semi-infinite reflectors on a rigid ground plane

Hopkins

Lam

2009

Applied Acoustics

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The sound field in front of, and close to a building facade is relevant to the measurement and prediction of environmental noise and sound insulation. For simplicity it is often assumed that the facade can be treated as a semi-infinite reflector, however in the low-frequency range this is no longer appropriate as the wavelengths are similar or larger than the facade dimensions. Scale model measurements and predictions using Integral Equation Methods have been used to investigate the effect of diffraction on the sound field in front of finite size reflectors. For the situation that is commonly encountered in front of building facades, the results indicate that diffraction effects are only likely to be significant in the low-frequency range (50 -200 Hz) when the façade dimensions are less than 5 m. This assumes that there is a point source close to the ground and microphones at a height of 1.2 or 1.5 m, at a distance between 1 and 2 m in front of the façade.

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