title: Three-dimensional parabolic equation model for low frequency sound propagation in irregular urban canyons.
abstract: A three-dimensional wide-angle parabolic equation (3DPE) is used to model low frequency sound propagation in irregular urban canyons at low computational cost. This one-way wave equation is solved using the Alternating Direction Implicit method. A finite difference scheme adapted to the geometry of the urban environment is then developed. Abrupt variations of the street width are treated as a single scattering problem using the Kirchhoff approximation. Numerical results are compared with experimental data obtained on a scale model of a street. Comparisons show the ability of the 3DPE model to provide reliable transmitted fields even for large irregularities.
authors.affiliation: LAUM, CNRS, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans, France.
authors.forename: Jean-Baptiste
authors.initials: JB
authors.lastname: Doc
authors.affiliation: LAUM, CNRS, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Lihoreau
authors.affiliation: LAUM, CNRS, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans, France.
authors.forename: Simon
authors.initials: S
authors.lastname: Félix
authors.affiliation: LAUM, CNRS, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Faure
authors.affiliation: LAUM, CNRS, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans, France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Dubois