Abstract
The boundary element method is used to model two-dimensional acoustic radiation and scattering from a body of arbitrary shape above an infinite plane of flat surface and homogeneous impedance. The particularity of the study is the use of an indirect integral representation of the solution, given in terms of the jumps of pressure and its normal derivative through the boundaries. A variational formulation is associated with the boundary indirect integral equations modeling our problem. The major difficulty in the formulation is the infinite feature of the plane, which is avoided by introducing an appropriate Green’s function. Numerical results of the attenuation of sound by noise barriers are presented. They show good agreement with other results in the literature.
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