SINGLE-PIECE KOCHETOV(S SOUND ABSORBER WITH HELICAL ELEMENTS Russian patent published in 2016 - IPC E04B1/84 

FIELD: sound absorption.

SUBSTANCE: invention relates to means of reducing noise in industrial and transport facilities. This is achieved due to that in a single-piece absorber with helical sound absorbing elements, frame consists of two parts, wherein lower, reactive part is made as a rigid hollow cylinder, bottom of which is connected to a supporting ring connecting with support disc, on which through elastic damping element is fixed upper part of frame, which is made of a rigid perforated cylindrical shell with a perforated cap and a solid base, connected to supporting ring, cavity of cylindrical shell is filled with sound absorbing material, and connection of upper and lower parts is made by elastic damping element to damp high-frequency vibrations, wherein a perforated cover perforated cylindrical shell is hinged element, whereby frame is attached to a desired object, such as ceiling of production premises, and around a rigid perforated cylindrical shell is at least one helical sound absorbing element made in form of a cylindrical helical spring encircling and based on turntable, wherein cavity of cylinder reactive part of frame is sealed by support disc with at least one opening, performing function of neck of a Helmholtz resonator, which is formed together with cylinder and around hollow cylinder is at least one helical sound absorbing element, made in form of a cylindrical helical spring embracing hollow cylinder and rests against supporting disc.

EFFECT: technical result is high efficiency of noise suppression at high frequencies by introduction into single-piece sound absorber volume cavities for Helmholtz resonators, which improve efficiency at high frequencies.

3 cl, 1 dwg