Predicting outdoor sound propagation in uncertain conditions remains challenging. There are limited data which enable us to relate accurately the variations in conditions in the propagation path with the fluctuations in the received acoustical signal. This paper investigates sound propagation in the case of a homogeneous atmosphere, over acoustically soft and hard impedance grounds, in the presence of geometrical uncertainty at the receiver position. Analyzing the effect of these parameters on the excess attenuation spectrum. A simple Monte Carlo method is used to generate the probability density function for the excess attenuation spectrum, sampling from two common distributions to represent the uncertainty, specifically being: normal and uniform. It is hoped that the effects from manipulating the input parameters will help better understand the uncertainty and moving forward be able to deal with it when performing statistical inversion techniques.
展开▼
