Patent ID: 8720642

Claim:
An acoustic element having at least two plate-like elements ( 1 , 2 ) each of which have a plurality of bores ( 1 c , 1 d , 2 c , 2 d ), said at least two plate-like elements configured for being joined together at confronting joining faces of each of said at least two plate-like elements, characterised in that the plurality of bores ( 1 c , 1 d , 2 c , 2 d ) of at least one plate-like element ( 1 , 2 ) each have at least two different diameters and are arranged so that one section ( 1 c , 2 c ) with the smaller diameter of the relevant bore faces an outside surface ( 1 b , 2 b ) of the acoustic element and one section ( 1 d , 2 d ) of the bore with the larger diameter points towards the confronting joining faces ( 1 a , 2 a ) of the at least two plate-like elements, and wherein the bores ( 1 c , 1 d , 2 c , 2 d ) are designed as stepped bores.