The Boundary Element Method (BEM) is used to study the sound wave propagation around elastic and rigid barrier placed over an elastic ground surface and inside a confined space. The presence of an elastic or rigid ground is simulated using adequate Green's functions, which take into account the required boundary conditions at the interfaces between either the air, the barrier and the elastic ground. Using this scheme, the BEM discretization is only required for the elastic barrier. The method used allows the full interactions occurring at the interfaces between the different media to be taken into account. Different simulations are performed assuming the presence of lightweight elastic screens placed over an elastic or a rigid ground, or inside a confined space. The elastic screen modeled is assumed to provide the shield for sound generated by spatially sinusoidal harmonic line pressure sources. An air gap is allowed under the acoustic screen. Results from different simulations are presented and compared with those obtained for a rigid barrier placed over a rigid ground.
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