KOCHETOV UNIT SOUND ABSORBER FOR TRANSPORT OBJECTS Russian patent published in 2018 - IPC E04B1/84 G10K11/16 

FIELD: construction.

SUBSTANCE: invention relates to means of reducing noise in industrial and transport facilities. Technical result is achieved by that, a unit sound absorber for transport objects comprises active and reactive sound absorbers placed on a rigid frame, frame is made of two parts, the lower, reactive part being made in the form of a rigid hollow cylinder-shaped structure, and the upper, active part is made in the form of a rigid perforated cylindrical shell with a perforated cover and a solid base, wherein the cavity of the cylindrical shell is filled with sound-absorbing material, and the upper and lower parts are connected by means of an elastic damping element, which allows to damp high-frequency oscillations, wherein the perforated cover of the perforated cylindrical shell is pivotally connected to an element by means of which the frame is fixed to the desired object, for example the ceiling of a production room, at least one screw-type sound-absorbing element is arranged around the perforated cylindrical shell in the form of a cylindrical helical spring encircling the shell.

EFFECT: technical result is an increase in the efficiency of noise attenuation at high frequencies by introducing into a unit sound absorber cavities for Helmholtz resonators that increase efficiency at high frequencies.

5 cl, 1 dwg