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Conference papers

Comparison of engineering models of outdoor sound propagation: NMPB2008 and Harmonoise-Imagine

Abstract : Different models of outdoor sound propagation can be used to predict transportation and industry noise for noise mapping or environmental impact assessment. We present here a comparison of noise attenuations predicted by a) the French engineering model NMPB 2008, designed for railway, road or industrial noise, b) the engineering model elaborated in the European Harmonoise/Imagine projects. The comparison has first been done by comparing the deviations between models for calculated sound attenuation for both homogeneous and downward propagation situations and for 7 experimental site configurations. Some significant deviations can be observed mainly for high frequencies and also for homogeneous propagation conditions. A comparison between calculated and experimental sound attenuations is also presented for each method, on the basis of 5 road noise experimental campaigns, where each site is representative of different common topographies. Some statistically significant deviations between both mean and standard deviation are observed between the two models. In light of these road traffic noise cases, the NMPB 2008 model appears to have a better accuracy and a better precision than the Harmonoise/Imagine model have.
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Submitted on : Monday, April 23, 2012 - 10:00:00 AM
Last modification on : Thursday, February 7, 2019 - 3:57:27 PM
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David Ecotiere, Cédric Foy, Guillaume Dutilleux. Comparison of engineering models of outdoor sound propagation: NMPB2008 and Harmonoise-Imagine. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811119⟩



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