초록 ▼

Soundproof lining for a gas pipe, in particular for a turbojet fan jet, of the type including a multiplicity of thin, perforated panels juxtaposed by tiling, as well as an intermediate layer between the wall of the pipe and each of said panels to delimit with said perforated panel a multiplicity of

Soundproof lining for a gas pipe, in particular for a turbojet fan jet, of the type including a multiplicity of thin, perforated panels juxtaposed by tiling, as well as an intermediate layer between the wall of the pipe and each of said panels to delimit with said perforated panel a multiplicity of resonant acoustical cavities in which the acoustical vents consist of the ports in the perforated panel. According to the invention, in order to make the tubular vents, each perforated panel has a short, tubular sleeve at right angles to each port and located on its face opposite the wall of the pipe.

대표청구항 ▼

A soundproof lining for the wall of a gas jet, said lining comprising: a plurality of thin panels having overlapping ends and extending parallel to said wall; means for fixing said panels directly to said wall and at a distance from said wall whereby said wall and panels define a space therebetween;

A soundproof lining for the wall of a gas jet, said lining comprising: a plurality of thin panels having overlapping ends and extending parallel to said wall; means for fixing said panels directly to said wall and at a distance from said wall whereby said wall and panels define a space therebetween; an intermediate ductile panel in said space, said ductile panel and said thin panels together defining a multiplicity of resonant acoustical cavities, wherein said intermediate panel comprises a thin polymer resin sheet having portions contacting said wall, said sheet including first ribs, the distal ends of said first ribs contacting said thin sheet to define said acoustical cavities; and a plurality of acoustical vents for said cavities, said vents comprising perforations in said thin panels.