Estimating long-term representative SPL in complex environments using a coupling method based on acoustic (MW-WAPE) and micrometeorological (SUBMESO) numerical predictions

摘要

This paper presents a method for estimating an acoustic level representative of the "long-term" sound pressure level. This is done through a coupling method using output data from a micrometeorological code as input data for a new acoustic code. The first part of this paper provides a short description of our acoustic (MW-WAPE) and micrometeorological (SUBMESO) codes respectively, next coupled through a suited routine. Our new PE code can deal with complex propagation situations including mixed influence of ground characteristics (topography, obstacles, impedance jumps, etc.) and atmospheric conditions (refraction and turbulence). Its associated micrometeorological code (SUBMESO) simulates wind and temperature fields over moderately complex terrain with high resolution. The second part is devoted to some comparisons between numerical predictions and experimental data issued from the LCPC experimental (monitoring) site located at Saint-Berthevin (F). Very good agreement with experimental data is obtained for both acoustical and micrometeorological predictions.