Soundproofing device for engine compartment of motor vehicle, has air-permeable protection screen arranged for passing sound waves from noise source towards soundproofing layer in which sound waves are captured

摘要

The device (10) has a soundproofing layer (11) that is realized by a soundproofing material and synthetic material e.g. polyolefin-based foam, that is commercialized by quash(RTM: blue polyethylene foam) mark. An air-permeable protection screen (12) is arranged for passing sound waves from a noise source towards the soundproofing layer in which the sound waves are captured and for preventing the re-emerging of the sound waves.