Sound field modelling in a narrow street by the transport theory

CFA/DAGA'04, 7ème Congrès Français d'Acoustique, STRASBOURG, FRANCE, 22-/03/2004 - 25/03/2004Noise is a major problem for people living in urban areas. Consequently, many mathematical and numerical models have been derived to predict the sound propagation in streets.However, because of the complexity of the façade effects, these models are not still satisfactory. The purpose of the present paper is to propose a general mathematical formulism to predict the temporal and the spatial distribution of the diffuse sound field energy in urban areas, including diffuse reflections by building façades. The models is based on an application of the classical theory of particles transport applied to the concept of sound particles