Temperature effect on tyre-road noise |
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Authors: | Fabienne Anfosso-Lé dé E,Yves Pichaud |
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Affiliation: | Section Acoustique Routière et Urbaine, LCPC centre de Nantes, BP 4129, 44341 Bouguenais cedex, France |
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Abstract: | Tyre-road noise emission decreases when the outdoor temperature increases, with a variation that can exceed −0.1 dB(A)/°C. This effect depends on tyre-road combination, but semi-generic corrections can improve the accuracy of tyre-road noise measurements. In this paper, the variation of pass-by noise level of a passenger car at 90 km/h with temperature is investigated, on seven types of road surfaces, under different temperature conditions. A good correlation between air, road surface and tyre temperature is outlined. A linear relationship between noise level and air temperature variations is observed for bituminous pavements, of about −0.1 dB(A)/°C, but reduced to −0.06 dB(A)/°C for pavements having porosity. No temperature effect is observed on cement concrete pavements. A spectral analysis shows that the temperature effect is highest in low and high frequency range, what can be explained by generating mechanisms rather than propagation. |
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Keywords: | Noise Tyre-road noise Pass-by noise Road surface Pavement Porous Temperature |
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