Acoustic liner and method of making an acoustic liner
AssigneeGeneral Electric Company
InventorsCarl E. Swindlehurst, Richard B. Plunkett, John F. Lennon
Life of this patent
Estimating the term…
Abstract
The need for a woven screen or mesh is eliminated in composite acoustic liners by providing an absorptive acoustic liner in which the perforated facesheet has a coating of an erosion-resistant material applied thereto. The coating can be applied using a simple spraying process. The acoustic liner can be easily tuned by regulating the thickness of the coating.
Claims30
An acoustic liner for use in attenuating noise, said liner comprising:
- a support layer having a multiplicity of partitioned cavities;
- a perforated sheet attached to one side of said support layer and having a plurality of perforations formed therein, each one of said perforations
- defining a wall;
- and
- a coating of an erosion-resistant material applied to one side of said perforated sheet and to said perforation walls.
An acoustic liner for use in attenuating noise, said liner comprising:
- a support layer having a multiplicity of partitioned cavities;
- an imperforate sheet attached to one side of said support layer;
- a perforated sheet attached to another side of said support layer and having a plurality of perforations formed therein, each one of said perforations defining a wall;
- and
- a coating of an erosion-resistant material applied to an exposed surface and to said perforation walls.
A method of making an acoustic liner for use in attenuating noise, said method comprising the steps of:
- providing a perforated sheet having a plurality of perforations formed therein, each one of said perforations defining a wall;
- coating one side of said perforated sheet and said perforation walls with an erosion-resistant material;
- and
- attaching said perforated sheet to one side of a support layer.
A method of treating an acoustic finer having a perforated sheet and a mesh disposed on said perforated sheet, said perforated sheet having a plurality of perforations and each one of said perforations defining a wall, said method comprising the steps of:
- removing said mesh;
- and
- coating one side of said perforated sheet and said perforation walls with an erosion-resistant material.
Dependencies are inferred from the claim text.