Structure for motor vehicle, has double wall structure comprising perforated or micro perforated wall integrated and spaced apart from acoustically sealing envelope wall in manner to absorb noise propagated in vehicle passenger compartment

摘要

The structure has reinforcements (22) reinforcing structural elements e.g. beam or hollow body (20), where the structural elements and the reinforcements form a double wall structure. The double wall structure comprises a perforated or micro perforated wall integrated and spaced apart from an acoustically sealing envelope wall in a manner to absorb noise propagated in a passenger compartment of a vehicle. The acoustically sealing envelope wall pertains the structural elements, and the perforated or micro perforated wall pertains the reinforcements.