Patent ID: 8899377

Claim:
An air conditioning conduit a sound-damping effect for an aircraft, comprising: a sound-damping wall that at least partially encloses a substantially continuous hollow space for guiding the air, the continuous hollow space including an air inlet opening and an air outlet opening, and the continuous hollow space for the conveyance of air directly adjoins the wall, the wall having a multilayer design including: a core layer including a sound-absorbing open-pore core material so that the wall shows an acoustic effect; and at least one first cover layer designed so as to be airtight and arranged on the external surface of the core layer, and laminarily connected to the core layer; wherein the laminar connection between the core layer and the at least one first cover layer causes a composite effect in such a manner that the wall is self-supporting and has a structural function in order to be able to transfer mechanically-occurring loads to structural parts of the aircraft so that the wall also provides a load-bearing effect, wherein the at least one first cover layer is integral with the core layer, and the at least one first cover layer is formed by closing the outer pores of the open-pore core material, the outer pores of the open-pore core material closed by at least one of compressing the outer layer of core material and melting an outer region of the core material, and wherein the core layer comprises an open-pore foam material.