CPC F02C 7/24 (2013.01) [B64D 29/00 (2013.01); G10K 11/168 (2013.01); F05D 2260/96 (2013.01)] | 21 Claims |
1. A method for manufacturing an acoustic element of a sound absorption structure comprising at least one chamber having a cylindrical, conical or truncated conical shape, wherein the method comprises:
cutting at least one preform out of a plate or sheet of material;
shaping the preform by rolling;
assembling two side edges of the preform to obtain the cylindrical, conical or truncated conical shape of the chamber; and
cutting at least one series of slits in the flat preform, before the shaping said preform.
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