Patent RU-2646872-C1 (RU)
Inventor: Kochetov Oleg Savelevich
IPC: G10K11/16
Filed: 2017-04-07
Granted: 2018-03-12
Abstract: FIELD: acoustics. 
     SUBSTANCE: invention relates to acoustic isolation of equipment with means of broadband acoustic suppression and can be used in all sectors of the national economy as a means of protection against noise. Technical result is achieved by the fact that the soundproofing enclosure is made in the form of a rectangular parallelepiped covering the process equipment, herewith the process equipment is installed on at least four vibration-proof supports, which are based on the intermediate plate of the building, wherein a gap is formed between the base of the process equipment and a cutout in the lower face of the rectangular parallelepiped, and ventilation ducts are provided in the soundproofing enclosure, while internal walls of the ventilation ducts are treated with a sound-absorbing material and an acoustically transparent material, while onto the inner surface of the soundproofing enclosure a sound-absorbing element is fastened in the form of a smooth and a perforated surfaces, between which there is a multi-layered sound-absorbing structure, which is made of a complex shape and is an alternation of solid sections and hollow sections, while the solid sections are formed by smooth prismatic surfaces, and also by two, connected with them and inclined with respect to the smooth prismatic surfaces, surfaces of a complex shape, and to the smooth surface tridimensional sound-absorbing elements are attached, while a material based on aluminum-containing alloys is used as the sound-absorbing material, and the material of the perforated surface is made of hard decorative vibro-damping materials, herewith the inner surface of the perforated surface is lined with an acoustically transparent material, and the hollow sections are filled with a sound-absorbing material, herewith the sound-absorbing element, which is fixed onto the inner surface of the soundproofing enclosure, is made in the form of a smooth and a perforated surfaces, between which the is a combined sound-absorbing layer of a complex shape, which is an alternation of solid sections and hollow sections, the frame of which is made from a rigid sound-absorbing material, the hollow sections are formed by prismatic surfaces having in the cross section parallel to the plane of the drawing the shape of a parallelogram, which internal surfaces have a toothed structure, herewith the vertices of the teeth face the inside of the prismatic surfaces, and the ribs of the prismatic surfaces are fixed respectively on the smooth and the perforated surfaces, herewith the cavities formed by the smooth and the perforated surfaces, between which the composite sound absorbing layer of a complex shape is located, are filled with a soft sound-absorbing material, and cavities of the hollow sections formed by the prismatic surfaces are filled with a foamed polymer, herewith the cavities of the hollow sections are connected by resonant holes with the cavities formed by the smooth and the perforated surfaces, between which the composite sound-absorbing layer of a complex shape is located. 
     EFFECT: technical result is higher efficiency of noise suppression. 
     1 cl, 3 dwg