ACOUSTIC SCREEN FOR PRODUCTION PREMISES Russian patent published in 2018 - IPC E04B1/84 

FIELD: acoustics.

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. Acoustic screen for industrial premises contains a skeleton with slopes from metal sheets containing sections of acoustic panels, which are both noise-reflecting translucent and noise-absorbing opaque. Their layout in the acoustic screen can be in any combination of vertical and horizontal rows. Wherein each of the opaque noise-absorbing acoustic panels comprises a smooth and perforated surfaces, between which there is a layer of noise-absorbing material of a complex shape, made in the form of alternating solid sections and hollow sections. Hollow sections are formed by prismatic surfaces that, in their cross-section parallel to plane of the drawing, have the shape of a parallelogram, whose inner surface has toothed or wavy structure. Tops of the teeth are directed inwards the prismatic surfaces, and the edges of the prismatic surfaces are fixed, respectively, on the smooth and perforated walls. Cavities of hollow sections, formed by the prismatic surfaces, are filled with a noise absorber, and between the smooth surface and continuous sections of the layer of noise-absorbing material of a complex shape, as well as between the perforated surface and solid areas, there are resonant plates with resonant inserts that perform the functions of the throats of the Helmholtz resonators.

EFFECT: technical result consists in increasing the efficiency of noise attenuation.

1 cl, 4 dwg