Speaker
Description
The French standard NF S 31-120 defines methods for characterizing meteorological conditions and ground properties relevant to outdoor sound propagation. For meteorological characterization, the standard proposes three approaches:(i) a classification method based on a meteorological analysis grid (UiTi),(ii) a method based on measurements of the acoustic velocity gradient, and(iii) a statistical method based on wind speed and wind direction data.The objective of this presentation is to compare the application of these three methods using a common dataset of acoustic and meteorological measurements, in order to identify acoustic indicators representative of unfavorable, homogeneous, and favorable sound propagation conditions. The ability of each method to synthesize information contained in the temporal evolution of the measurements is evaluated. Based on this comparison, recommendations are proposed concerning the appropriate use and limitations of each method.