Wind-induced vegetation noise. Part II: Field measurements

摘要

In a preceding paper [I] the development of a semi-empirical analytical model for the prediction of the wind-induced vegetation noise was presented. The present paper is devoted to the calibration and the validation of this model by held measurements. It is shown that the model gives reliable predictions, both in terms of frequency distribution and A-weighted sound pressure levels, near the vegetative sources, while some discrepancies between theory and measurements appear when the propagation distance increases. The validation is based on 41 measurement results obtained at seven sites for different propagation distances and wind speeds. It is seen that the model predicts the A-weighted level with a mean error of 0.25 dB and a standard deviation of 3.7 dB. Nevertheless, this standard deviation is reduced to 3.0 dB if some suspicious data are removed from the validation. [References: 11]