Porous acoustic element and a method of controlling...

Details Porous acoustic element and a method of controlling... Porous acoustic element and a method of controlling...

F - Mech Eng,Light,Heat,Weapons

01

N

26/111, 242/57.1

F01N 1/24 (2006.01)

Patent

CA 1121784

ABSTRACT OF THE DISCLOSURE The present invention provides a method of manufacturing a porous acoustic element comprising: winding a plurality of windings of wire on a mandrel at a constant spaced apart pitch, successive windings crossing each other to create a first porous layer; placing a transition plenum layer over said porous layer; winding a plurality of windings of wire on said mandrel over said transition layer at a constant spaced apart pitch differing from the pitch of said first porous layer windings, successive windings crossing each other to create a second porous layer; bonding said windings in said first and second porous layers and said transi- tion layer together to create a unitary strucutre.

358612

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