Abstract: This assembly includes an elastic and porous base spring layer intended to be placed facing a surface, in particular of an automobile vehicle, and an intermediate insulation layer impervious to the passage of air, the intermediate layer being positioned on the base spring layer. The airproof intermediate layer has a surface mass density of less than 500 g/m2, the sound proofing assembly including a porous stiffening layer, positioned in contact with the impervious intermediate layer. The porous stiffening layer has a smaller thickness than the thickness of the base spring layer and a flexural stiffness, reduced to a unit width, of more than 0.01 N.m.

Abstract: This assembly includes an elastic and porous base spring layer intended to be placed facing a surface, in particular of an automobile vehicle, and an intermediate insulation layer impervious to the passage of air, the intermediate layer being positioned on the base spring layer. The airproof intermediate layer has a surface mass density of less than 500 g/m2, the sound proofing assembly including a porous stiffening layer, positioned in contact with the impervious intermediate layer. The porous stiffening layer has a smaller thickness than the thickness of the base spring layer and a flexural stiffness, reduced to a unit width, of more than 0.01 N·m.

Abstract: The assembly comprises a base spring layer made with a base of a resilient porous material, and the base spring layer being intended to be placed opposite a surface of the automobile. It comprises a stiffening layer arranged above the base spring layer and having a surface density greater than 250 g/m2 and at least one resilient porous upper layer arranged on the stiffening layer. The stiffening layer is made with a base of a dense porous material having a resistance to air flow strictly greater than 2000 N·m?3·s. The assembly advantageously has an upper resistive layer.

Abstract: The assembly comprises a base spring layer made with a base of a resilient porous material, and the base spring layer being intended to be placed opposite a surface of the automobile. It comprises a stiffening layer arranged above the base spring layer and having a surface density greater than 250 g/m2 and at least one resilient porous upper layer arranged on the stiffening layer. The stiffening layer is made with a base of a dense porous material having a resistance to air flow strictly greater than 2000 N.m?3.s. The assembly advantageously has an upper resistive layer.

Abstract: A sound-insulation component for a rigid structural member, of the type including a mass-spring system (12) includes at least one layer of a heavy mass (16) and one layer defining a spring (14), and a sound absorption system (18) with two layers having different air-flow resistances. The structural member is a metal sheet, the mass-spring system (12) is provided on one side of the rigid structural member (10), and the sound absorption system (18) is provided on the other side of the rigid structural member (10). The first layer (22) among the two layers of the sound absorption system (18) consists of a non-woven fabric having an adjustable air-flow resistance. Application in the sound insulation of automobiles.

Abstract: The invention relates to an end wall module for a transport vehicle. The inventive end wall module having a first wall and the second wall arranged at a distance therefrom. The first wall is embodied in the form of a first corrugated structure and the second wall is embodied in the form of a second corrugated structure. Said corrugated structures are embodied in such a way that they are distanced from each other when the end wall module is mounted without being deformed and are engaged into each other by the shape thereof when the end wall module is at least in the first deformation stage.

Abstract: The invention relates to an end wall module for a transport vehicle. The inventive end wall module having a first wall and the second wall arranged at a distance therefrom. The first wall is embodied in the form of a first corrugated structure and the second wall is embodied in the form of a second corrugated structure. Said corrugated structures are embodied in such a way that they are distanced from each other when the end wall module is mounted without being deformed and are engaged into each other by the shape thereof when the end wall module is at least in the first deformation stage.