Exploiting ground effects for surface transport
noise abatement

Attenborough, Keith; Bashir, Imran; Taherzadeh, Shahram

doi:10.1515/noise-2016-0001

Cited by 13 publications

(11 citation statements)

References 35 publications

(86 reference statements)

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“…Both measurements and simulations point at the important advantage of (natural) landscaping in mitigating sound propagation from a highway towards its surroundings. Not only the shape of the terrain, but also the ground properties should be controlled for (Attenborough et al, 2016). This type of noise reducing measure should therefore be promoted in future highly noise-exposed traffic environments on condition that the necessary space is available.…”

Section: Discussionmentioning

confidence: 99%

Landscaping for road traffic noise abatement: Model validation

Renterghem

Botteldooren

2018

Environmental Modelling & Software

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The idea of "acoustical landscaping" has been introduced  Combined terrain undulation and ground type can abate road traffic noise efficiently  Full-wave and diffraction based models accurately predict sound transmission losses  Common engineering methods provide only poor predictions even at short range  Detailed ground property modeling is of main importance near natural embankments 3 ABSTRACT Deliberately changing terrain undulation and ground characteristics ("acoustical landscaping") is an potential noise abatement solution near roads. However, there is hardly any research regarding the validity of sound propagation models to predict its effectiveness. Long-term continuous sound pressure level measurements near a complex road traffic and sound propagation case were performed. Three types of modeling approaches were validated, covering the full spectrum of available techniques. A twodimensional full-wave technique (the finite-difference time-domain method, FDTD), but also an advanced engineering model (the Harmonoise point-to-point model), provide accurate transmission loss predictions, both in 1/3 octave bands and for total A-weighted sound pressure levels. Two common and widely used semi-empirical engineering methods (ISO9613-2 and CNOSSOS) yield rather inaccurate results, notwithstanding the short propagation distance. The sensitivity to input data was assessed by modelling various scenarios with the FDTD method. Detailed ground effect modelling was shown to be of main importance.

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Section: Discussionmentioning

confidence: 99%

Landscaping for road traffic noise abatement: Model validation

Renterghem

Botteldooren

2018

Environmental Modelling & Software

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“…The B is 1 for the completely covered grass, and for hard ground, the B is 0 [33]. B is 0.3 for the gravel grounds [34]. The ground of the study area covered by grass ground and hard ground.…”

Section: Calculate the Noise Levelsmentioning

confidence: 99%

3D Kriging interpolation for traffic noise visualization: designing noise observation points and valuation of spatial interpolation accuracy

Wickramathilaka,

Ujang

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Identifying the risk of traffic noise is vital in minimizing traffic noise pollution in urban areas. As noise travels in every direction, 3D visualization of traffic noise is essential, which involves visualising traffic noise along the facades of buildings. A standard traffic noise model is necessary to calculate traffic noise levels, as several factors affect traffic noise. Moreover, designing noise observation points in 3D and spatial interpolation play significant roles in 3D noise visualisation. Therefore, this study demonstrates the results by elaborating on the spatial interpolation and designing noise observation points. A noise observation point consists of four parameters in 3D space. Generally, Inverse Distance Weighted (IDW), Triangular Irregular Network (TIN), and Kriging do not support the interpolation of four parameters in 3D. However, 3D Kriging in Empirical Bayesian Kriging provides significant opportunities to interpolate noise levels in 3D. However, the elements of the function of spatial interpolations are vital for accuracy. The 3D Kriging uses different variograms according to semivariance. This variogram directly impacts the weighting factor of 3D Kriging. Therefore, this study develops a comparison to identify the impact of different variograms on the accuracy of 3D Kriging interpolation on traffic noise.

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“…Ground effects should be exploited for noise reduction along larger roads [47]. While it might be difficult to achieve as much reduction as with traditional noise barriers, there are other advantages such as preventing impassible divisions and adding "green" to the urban environment.…”

Section: Groundmentioning

confidence: 99%

Improved acoustics for semi-enclosed spaces in the proximity of residential buildings

et al. 2023

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Continuous urban densification exacerbates acoustic challenges for residents of housing complexes. They are confronted with higher noise immission from railway, road traffic, construction, as well as louder neighborhood acoustic environments. Thereby, not only noise immission indoors is associated with stress, annoyance, and sleep disturbance, but also the immediate outdoor living environment (e.g., courtyards, private gardens, and playgrounds, etc.) can be acoustically unpleasant and annoying. This non-exhaustive narrative review paper elaborates on the role of a number of design parameters on improving the quality of the outdoor soundscape of housing complexes: architectural and morphological design, facade material characteristics, balconies, greenery, ground, background sounds, and several factors concerning quality of sounds (e.g., multisensory perception, holistic design, the relevance of space, context, social factors, co-creation, etc.). It mainly covers literature including both acoustical (e.g., sound pressure level and room acoustical parameters) and human/perceptual (e.g., comfort and annoyance) factors. A series of recommendations are presented here as to how the semi-enclosed outdoor spaces in the proximity of residential complexes can be acoustically improved.

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Exploiting ground effects for surface transport noise abatement

Cited by 13 publications

References 35 publications

Landscaping for road traffic noise abatement: Model validation

Landscaping for road traffic noise abatement: Model validation

3D Kriging interpolation for traffic noise visualization: designing noise observation points and valuation of spatial interpolation accuracy

Improved acoustics for semi-enclosed spaces in the proximity of residential buildings

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