ACOUSTIC SCREEN FOR PRODUCTION PREMISES Russian patent published in 2018 - IPC E04B1/82 G10K11/16 E01F8/00 

FIELD: acoustics.

SUBSTANCE: invention relates to industrial acoustics, particularly, to broadband acoustic suppression, and can be used in all national economy industries as a means of protection from noise. Technical result is achieved by the fact that the acoustic screen for industrial premises contains a frame with slopes from metal sheets with sections of acoustic panels located therein, which are made both noise reflecting light transparent, and noise absorbing nontransparent, wherein their layout in the acoustic screen can be of any combination of vertical and horizontal rows, at that each of the noise absorbing nontransparent acoustic panels is made in the form of rigid and perforated walls, between which layers of sound-reflecting, as well as sound-absorbing materials of different density are located arranged in two layers, and the layers of the sound reflecting material are made of a complex profile consisting of uniformly distributed hollow tetrahedrons that allow to reflect the sound waves falling in all directions and which are located respectively at the rigid and perforated walls, and the sound-reflecting material layers are made from heat-insulating material able to maintain preset microclimate in the room, and as the sound-absorbing material the sheet sound-protecting material is are used, which is made on the basis of magnesia binder with reinforcing fiberglass or glass cloth, or as the sound-absorbing material the polyester is used, or as the sound-absorbing material the porous sound-absorbing ceramic material is used, at that, the noise absorbing nontransparent acoustic panel is made with resonant inserts and contains smooth and perforated surfaces, between which there is a layer of sound-absorbing material of complex shape, which is an alternating solid and hollow sections, wherein the hollow areas are formed by prismatic surfaces in cross section having the parallelogram shape, which inner surfaces have a toothed structure, the tips of the teeth turned inward the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on the smooth and perforated walls, and cavities of hollow sections formed by prismatic surfaces are filled with a sound absorber, and between a smooth surface and continuous sections of a layer of sound-absorbing material of a complex shape, as well as between the perforated surface and solid areas, the resonant plates with resonant inserts are located, and inside the hollow sections, which inner surfaces have a jagged structure, additional resonant elements are located.

EFFECT: technical result is the improvement in the efficiency of acoustic suppression.

1 cl, 4 dwg