MATERIAL FOR ABSORBING NOISE IN AIRCRAFT

摘要

The invention relates to a material for absorbing noise in aircraft, comprising at least one barrier layer and at least one absorptive layer. The barrier layer is provided with an elastomeric material having a minimum specific density of 1 and a mass per unit area of 1.3 kg/m² or less while the absorptive layer is equipped with a porous and/or open-cell material having a weight per volume of 4 to 50 kg/m³, preferably 10 to 40 kg/m³, more preferably 15 to 35 kg/m³, even more preferably 20 to 30 kg/m³. The mass per unit area of the sound-absorbing material amounts to 2 kg/m² or less.