Element for sonic and vibratory absorption

Claim 1

An element for sonic and vibratory absorption, comprising a first series of longitudinal ribs of flexible material, the ribs being of substantially uniform height and approximately trapezoidal cross section, the ribs extending substantially equidistantly and parallel to each other over the entire length of the element and projecting from the top side and the bottom side of the element, the top side and bottom side ribs being in staggered relationship and each two ribs defining a space therebetween, and a second series of longitudinal ribs of a height inferior to that of the ribs of the first series and of approximately trapezoidal cross section, each rib of inferior height being arranged in a respective one of said spaces, each rib of inferior height projecting from the top side being in alignment with a respective rib of the first series projecting from the bottom side and each rib of inferior height projecting from the bottom side being in alignment with a respective rib of the first series projecting from the top side, said element further comprising a stop extending over the entire length of the element at least at one longitudinal side of the element and a rigid support fixedly arranged on the ribs of the first series projecting from the top side, said rigid support comprising a stop ledge projecting perpendicularly to the support and parallel to the stop and having an upper rim embedded in the stop and wherein said rigid support has a planar base plate defining an array of openings gripping the ribs of the first series projecting from the top side, said ribs having buffer portions extending above the rigid support and projecting from the openings.