KOCHETOV'S SOUND ABSORBING ELEMENT Russian patent published in 2015 - IPC E04B1/84 

FIELD: machine building.

SUBSTANCE: in sound-absorbing element made in form of smooth reflecting surface, located at the middle of the element and dividing it to two symmetrical parts: top and bottom, each comprises perforated surfaces, between them sound-absorbing structure is installed, it comprises three layers of sound-absorbing material, at that the first layers, more rigid, are made continuous and profiled, and are secured on the smooth surface, the second layers, more soft, then the first layers, are made discontinuous and are located in focus of the sound reflecting surfaces of the first layers, the discontinuous sound-absorbing layers located in focus of the continuous profiled layers are made in form of the rotation bodies, for example balls, ellipsoids of rotation, and are secured using the rods, parallel to the smooth and perforated surfaces, that are rigidly linked with the smooth surface by means of then vertical, perpendicular to them fastening elements, for example plates, one end of them is rigidly secured to the smooth surface, and second is made in form of the clevis enclosing the rod and drawing them together by screws. The invention is developed in depending claims.

EFFECT: enhanced efficiency of sound absorption and reliability of the structure in general.

5 cl, 1 dwg