Abstract: An acoustic and thermal shield for a motor vehicle, including a porous shell based on fibers bound together by a binding agent and a spring layer based on elastically compressible polyurethane foam, the porosity of the shell being such that the foam is able to create a sealed skin on the underside of the shell, which fibers consist of two types: thick reinforcing fibers in an amount of 25 to 40% by weight of the shell and fine fibers in an amount of 15 to 35% by weight of the shell, the bonding agent being formed by fusible bonding fibers in an amount of 35 to 50% by weight of the shell, so that substantially no foam penetrates the thickness of the shell.

Abstract: The invention relates to a sound protection screen with an external shell made of a moulded thermoplastic material, an internal sub-layer based on resiliently compressible moulded polyurethane foam. The sub-layer is over-moulded with the rear side of the external shell. by over-moulding The shell is based on a sheet of thermoformed thermoplastic material and has a thickness between 0.2 and 1 mm. The shell can be a two-layered shell, with an external layer based on polyolefin. The external layer having at the side of the sub-layer, in order to allow adhesion between the shell and the sub-layer, with a rear layer based on a thermoplastic material that adheres to the foam. The shell can also be a single layer based on polyolefin, the rear side being subjected to a surface treatment that allows the adhesion to the sub-layer to be improved.