ACOUSTIC SCREEN FOR SAFE OPERATION OF OPERATOR Russian patent published in 2018 - IPC E04B1/84 G10K11/16 

FIELD: acoustics.

SUBSTANCE: invention relates to the acoustic screen. Acoustic screen for the human operator safe operation, containing frame with slopes from the metal sheets with the acoustic panels sections located therein, which are made both translucent noise-reflecting and opaque noise-absorbing, wherein 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 the sound-absorbing material layers are arranged, perforated surface material is made of hard, decorative vibration damping materials, for example, PVC compound of “Agat”, “Antivibrit”, and “Schwim” types, wherein the facing sound-absorbing structure perforated surface inner surface is lined with acoustically transparent material, for example, glass fabric of EZ-100 type or polymer of “Poviden” type. Each of the opaque sound-absorbing acoustic panels contains the complex shaped sound-absorbing material layer, which is alternation of solid areas and hollow sections. Hollow sections are formed by prismatic surfaces that are in their cross-section parallel to the plane of the drawing, have the shape of a parallelogram, whose inner surface has a toothed or wavy structure. Teeth tops face inside the prismatic surfaces. Ribs of the prismatic surfaces are secured on the smooth and perforated walls respectfully. Cavities of hollow sections, formed by prismatic surfaces, are filled with a sound absorber. Between the complex shaped sound-absorbing material layer surface and solid sections, as well as between the perforated surface and solid sections, there are resonant plates with resonant inserts performing the functions of the neck of Helmholtz resonators.

EFFECT: higher efficiency of noise suppression.

1 cl, 4 dwg