Abstract
This presentation reports on calculations carried out to investigate the effect of meteorological conditions on the performance of ground treatments for traffic noise reduction. These treatments include placing strips of acoustically soft or rough surfaces near the source. The soft or rough strip can be raised up to 30 cm. In other words, the height of the rough elements can be as much as 30 cm. Their upper surface height can also be the same as the ground surface or, in other words, the treatments can be recessed. We present and discuss numerical predictions of the influence of downwind and upwind conditions on the insertion loss of raised and recessed, acoustically soft strips or strips of roughness elements in 2D using a Parabolic Equation code.
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