Acoustic absorber/barrier composite

摘要: A thermoformable acoustic sheet material that is lightweight and provides excellent sound attenuation over a wide range of frequencies includes combination attenuating materials, including an barrier having relatively high density, absorbing layer low substantially air-impermeable between the layer, performance enhancing scrim or perforated thermoplastic film on opposite side layer. The useful for preparing contoured treatments reducing transmission from engine compartment vehicle to passenger vehicle.