METHOD OF SOUND INSULATION OF EQUIPMENT AND SOUND-INSULATING FENCING Russian patent published in 2018 - IPC E04B1/82 G10K11/16 

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, at the same time, the technological equipment is installed on at least four vibro-insulating supports, which are based on the floor of the building, the gap between the base of the process equipment and the notch in the lower face of the rectangular parallelepiped is designed to exclude the transfer of vibrations from the process equipment to the soundproof enclosure, and in the soundproof enclosure ventilation ducts are made to eliminate overheating of the equipment, while the internal walls of the ventilation ducts are treated with the sound-absorbing material and with the acoustically transparent material such as "visible" one, while on the inner surface of the soundproofing enclosure the sound-absorbing element is fastened in the form of smooth and perforated surface, between which the multi-layer sound-absorbing structure is located, which is made of a complex shape and is an alternation of solid sections and hollow sections, while solid sections are formed by smooth prismatic surfaces located perpendicular to the smooth and perforated surfaces and fixed to a smooth surface, and also two, connected with them and inclined, relatively smooth prismatic surfaces, surfaces of complex shape, having on the one hand a smooth surface, and on the other hand dentate or wavy, and to the smooth surface are attached relief sound-absorbing elements, for example in the form of tetrahedra, while the quality of the sound-absorbing material is based on a material based on aluminum-containing alloys, the inner surface of the perforated surface facing the sound-absorbing structure is lined with an acoustically transparent material, and the hollow sections are filled with sound-absorbing material, the sound-absorbing element being made in the form of two layers: one of which, adjacent to the rigid wall, is sound-absorbing, and the other, that adjacent to the perforated wall, is made with a perforation from a sound-reflecting material of a complex profile consisting of uniformly distributed hollow tetrahedra, while a material based on aluminum-containing alloys is used as a sound-reflecting material.

EFFECT: technical result is the increased efficiency of noise suppression.

1 cl, 3 dwg