SOUND-ABSORBING ELEMENTS OF ROOMS Russian patent published in 2013 - IPC E04B1/74 

FIELD: construction.

SUBSTANCE: in sound-absorbing elements of a room comprising shaped and perforated walls, between which there is a layer of a sound-absorbing material, besides, one of the walls is made smooth, and the sound-absorbing material is arranged in two layers, one of which, the harder one, is solid and shaped, and the other one, the soft one, is made as interrupted and is arranged above surfaces of the first layer, the sound-absorbing elements of the room contain a frame, window, door openings, openings for placement of lamps and acoustic barriers, made in the form of stiff and perforated walls, between which there is a sound-absorbing material arranged into two layers, one of which, the harder one, is made as solid and shaped, of complex profile, made of inclined faces directed downwards, and connected with horizontal faces, in which resonant holes are made, and the other one - the soft one, is made as interrupted and is arranged under sound-reflecting surfaces of the first layer. The solid shaped layer of the sound absorbing material is made from a material, in which the coefficient of sound reflection is more than the sound absorption coefficient.

EFFECT: increased efficiency of noise absorption.

3 cl, 5 dwg