Patent ID: 8308103

Claim:
An insulating mat for the sound insulation of an aircraft fuselage structure comprising frames and stringers extending transverse to the frames, wherein the insulating mat comprises: a plurality of fastening clips for fastening edge regions of the insulating mat on the frames of the aircraft structure, the fastening clips being fixed on a first surface of the insulating mat and laterally protruding over the border of the insulating mat; a layer with a plurality of holes, wherein a second surface of the insulating mat at least in a region around fastening points, where the mat is to be fastened to the stringers by fastening means through a plurality of through-openings in the mat, is coated by the layer, wherein the layer is adapted to absorb tension exerted upon the insulating mat by said fastening clips when fastened to the stringers for preventing sagging of the insulation mat; and an impervious cover foil arranged such that the layer lies between the cover foil and the insulating mat; wherein the cover foil is regionally decoupled from the layer such that the cover foil is deformable in the region around the through-openings independently of the layer.