COMPLEX FOR ACOUSTICAL PROTECTION OF THE OPERATOR Russian patent published in 2018 - IPC E04B1/84 G10K11/16 

FIELD: acoustics.

SUBSTANCE: invention relates to means of safety of operation of operators in emergency situations, particularly at high levels of noise. Complex for acoustic protection of the operator contains the operator's workplace equipped with noise reduction means. Operator's workplace is located between the acoustic screens, which protect the operator from direct sound, spreading from the vibration equipment, and above the working area there is an acoustic suspended ceiling located in the upper zone of the room, and to reduce the sound vibration, the operator's workplace is equipped with a floor on an elastic base that ensures two-stage vibration protection of the operator, and also a rocker sound absorber is provided, which consists of a rigid frame, hooked on the cables to the ceiling of the building with sound-absorbing material inside the frame, wrapped in a mesh capron fabric. In the structures of the wall sound-absorbing panel, a sound-absorbing element is used, comprising a smooth and perforated surface, between which there is a layer of sound-absorbing material of complex shape, which is an alternation of continuous 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. Tops of the teeth face inside the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on the smooth and perforated walls. Cavities of the hollow sections, formed by prismatic surfaces, are filled with a sound absorber, and between the smooth surface and continuous sections of the layer of sound-absorbing material of complex shape, 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: technical result is an increase in the efficiency of noise suppression.

1 cl, 2 tbl, 8 dwg