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Landscaping for road traffic noise abatement : model validation

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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 two-dimensional 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 modeling various scenarios with the FDTD method. Detailed ground effect modeling was shown to be of main importance.
Keywords
OUTDOOR SOUND-PROPAGATION, BARRIER PERFORMANCE, HARMONOISE PROJECT, IMPEDANCE MODELS, REDUCTION, Outdoor sound propagation, Terrain effect, Engineering models, Full-wave, models, Road traffic noise, Noise mapping

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Citation

Please use this url to cite or link to this publication:

Chicago
Van Renterghem, Timothy, and Dick Botteldooren. 2018. “Landscaping for Road Traffic Noise Abatement : Model Validation.” Environmental Modelling & Software 109: 17–31.
APA
Van Renterghem, T., & Botteldooren, D. (2018). Landscaping for road traffic noise abatement : model validation. ENVIRONMENTAL MODELLING & SOFTWARE, 109, 17–31.
Vancouver
1.
Van Renterghem T, Botteldooren D. Landscaping for road traffic noise abatement : model validation. ENVIRONMENTAL MODELLING & SOFTWARE. 2018;109:17–31.
MLA
Van Renterghem, Timothy, and Dick Botteldooren. “Landscaping for Road Traffic Noise Abatement : Model Validation.” ENVIRONMENTAL MODELLING & SOFTWARE 109 (2018): 17–31. Print.
@article{8578898,
  abstract     = {Deliberately changing terrain undulation and ground characteristics ({\textacutedbl}acoustical landscaping{\textacutedbl}) 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 two-dimensional 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 modeling various scenarios with the FDTD method. Detailed ground effect modeling was shown to be of main importance.},
  author       = {Van Renterghem, Timothy and Botteldooren, Dick},
  issn         = {1364-8152},
  journal      = {ENVIRONMENTAL MODELLING \& SOFTWARE},
  language     = {eng},
  pages        = {17--31},
  title        = {Landscaping for road traffic noise abatement : model validation},
  url          = {http://dx.doi.org/10.1016/j.envsoft.2018.08.012},
  volume       = {109},
  year         = {2018},
}

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