Faurecia Automotive Industrie

Lars Bischoff

Arnaud Duval

Jean-François Rondeau

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/m, 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.

Soundproofing assembly, in particular for a motor vehicle

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/mand 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&#xb7;m&#xb7;s. The assembly advantageously has an upper resistive layer.

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Hamburg, Germany

Lars Bischoff