Patent ID: 6840349

Claim:
Multi-component acoustically resistive layer, for acoustical attenuation panels of the type constituted by a cellular core ( 1 ) flanked on the sound wave arrival side, by an acoustically damping layer ( 2 ) and, on the opposite side, by a rear reflector ( 3 ), characterized in that it is constituted: by a first structural component ( 4 ) in contact with the aerodynamic flow informed by at least one layer of fibers connected by a suitable resin and oriented in the direction of aerodynamic flow, said component ( 4 ) comprising a suitable open surface quantity; by a dissipating component ( 6 ) disposed against the surface of said first component ( 4 ) opposite said flow, formed by a metallic cloth; and by a second structural component ( 7 ) formed of at least one layer of fibers connected by a suitable resin, oriented orthogonally to said direction of aerodynamic flow, said second structural component ( 7 ) being connected to said cellular core ( 1 ) and comprising a suitable open surface quantity.