METHOD OF OPERATOR ACOUSTIC PROTECTION Russian patent published in 2017 - IPC E04B1/82 G10K11/16 

FIELD: construction.

SUBSTANCE: method of operator acoustic protection includes equipping the operator's workplace with noise reduction means. The operator's workplace is placed between the acoustic screens and thus protects operator from direct sound, which is spread from the vibration equipment. To reduce sound vibration, the operator's workplace is equipped with a two-stage vibration protection system made in the form of a floor on an elastic base that contains a mounting plate made of concrete reinforced with vibration cusioning material, which is installed on the base plate of the inter overlapping with cavities through the layers of vibration cushioning material and waterproofing material with a gap relative to the bearing walls of the production room. The layers of the vibration cushioning material and the waterproofing material are made with a flange that fits to the bearing structures of the walls and the base bearing plate of overlapping. The cavities are filled with vibration cushioning material, for example foamed polymer, or polyethylene, or polypropylene. Above the equipment, spherical sound absorbers are installed, which are hinged to the metal structure. Each spherical absorber contains sound absorbers of active and reactive types, placed on a rigid frame, which is made of two parts. The lower, reactive part is made in form of spherical shape with an internal congruent spherical resonance cavity formed by a rigid continuous spherical shell with an equidistant perforated spherical outer shell which is connected to the upper active part which is made in the form of a rigid perforated cylindrical ring shell with a perforated cover and a solid base. The cavity of the cylindrical ring shell is filled with sound absorbing material, and the connection of the upper and lower parts of the sound absorber is performed by means of an elastic cushioning element, which allows to damp high-frequency oscillations. At least three rigid perforated cylindrical ring shells with a perforated cover and a solid base are located around the outer perforated spherical shell of the reactive part of the sound absorber, in its horizontal diametral plane. The cavity of cylindrical ring shell is filled with a sound-absorbing material.

EFFECT: invention makes it possible to increase the efficiency of noise attenuation by increasing the sound absorption coefficient by increasing the sound absorption surfaces while maintaining the overall dimensions of the room.

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