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

FIELD: construction.

SUBSTANCE: invention relates to industrial acoustics, particularly, to broadband acoustic suppression, and can be used in all sectors of national economy as means of noise protection. Technical result is achieved by the fact that an acoustic screen for production premises contains a frame with slopes from metal sheets with the sections of acoustic panels located in it, which are made both by noise-reflecting translucent and opaque sound-absorbing, and their arrangement in the acoustic screen can be in any combination of vertical and horizontal rows, each of the opaque sound-absorbing acoustic panels is made in the form of rigid and perforated walls between which there are layers of sound reflecting as well as sound-absorbing materials of different densities located 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 layers of the sound-reflecting material are made of a heat-insulating material capable of maintaining a given microclimate indoors, and as a sound-absorbing material, mineral wool boards are used, and the sound-absorbing element is faced with an acoustically transparent material throughout its surface, and the perforated wall has the following perforation parameters: holes diameter - 3÷7 mm, perforation percentage 10÷15%, and by the form holes can be made in the form of openings of a round, triangular, square, rectangular or diamond-shaped profile, herewith, in the case of non-circular holes, the maximum diameter of the circle inscribed in the polygon should be considered as the nominal diameter, as a sound-absorbing material of opaque sound-absorbing acoustic panels, a porous noise-absorbing material is used, or as a sound-absorbing material of opaque sound-absorbing acoustic panels, a rigid porous material is used, in this case the multi-layer sound-absorbing element is made in the form of two layers, one of which, adjacent to the rigid wall is sound-absorbing, and the other, adjacent to the perforated wall, is made with a perforation from a sound reflecting material of a complex profile consisting of uniformly distributed hollow tetrahedrons.

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

1 cl, 4 dwg