The influence of wind on the performance of noise screens

The effect of wind on the performance of a noise screen has been studied. Based on wind tunnel experiments and numerical computations of flow over an obstacle, an analytical approximation of the wind speed field near a noise screen has been developed. The wind speed field is used for numerical computations of downwind sound propagation over a screen, performed with the parabolic equation method. For some source-screen-receiver configurations it is found that the effect of wind on the performance of a screen is substantial. Further, it is found that the effect of screen induced wind speed gradients cannot be ignored in many situations.