Acoustical barrier for vehicles

Acoustics – Sound-modifying means – Sound absorbing panels

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Details

181294, E04B 182

Patent

active

048009849

ABSTRACT:
An acoustical barrier usable for sound deadening and vibration dampening in vehicles which includes a base layer of a flexible foam secured at the outer surface to an insulation layer of polyurethane elastomer molded to the shape of the area to be insulated such as an automobile fire wall area. The inner surface of the base layer will preferably be in contact with the area to be insulated. The polyurethane elastomer of the insulation layer will preferably include a natural mineral filler impregnated therein. The insulating layer provides the rigid form for holding of the flexible foam, which itself provides a stand-off to hold the insulating layer in spaced relation with respect to the vibrating surface. The polyurethane elastomer can vary in thickness in proportion to the level of acoustical activity of the area to be insulated.

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