Patent ID: 7963364
Filing Date: 2011-06-21
Classification: G10K,Y10T

Abstract:
1. Porous metal body having two opposite main faces and adapted to attenuate the noise produced or transmitted by a current of gas sweeping over a first of said main faces, said body having pores ( 1 , 2 ) in the form of cylindrical channels the axes of which extend substantially along straight lines perpendicular to said first face, opening out in said first face at a first one of their ends and closed off at their opposite end, each channel having a diameter (D) of between about 0.1 and 0.3 mm and being located, over at least part of its length, at a minimal distance (e) from its closest neighbours of between about 0.02 and 0.3 mm, and the ratio between the length and diameter of the channels being more than 10.