SOUNDPROOFING CASING Russian patent published in 2018 - IPC E04B1/82 F16P1/02 F16F15/00 

FIELD: acoustics.

SUBSTANCE: invention relates to soundproofing equipment by broadband noise attenuation. Soundproofing casing covering the process equipment that is installed on the intermediate plate of the building by means of at least four vibration-proof supports made of a resilient material is faced with an absorbent element on the inside and has the form of a rectangular parallelepiped with a cutout in its lower face for the base of the process equipment. Base of the process equipment is installed on at least four vibration-proof supports, which are based on the intermediate plate of the production building. Between the base of the process equipment and the cutout in the lower face of the rectangular parallelepiped a gap is made to prevent the transmission of vibrations from the process equipment to the soundproofing casing, in which ventilation ducts are made to eliminate the equipment overheating. Internal walls of the ventilation ducts are treated with a sound-absorbing material and an acoustically transparent material of the "poviden" type. Sound-absorbing element fixed onto the inner surface of the soundproofing casing comprises a smooth and a perforated surfaces, between which there is a multilayer sound-absorbing structure, which is an alternation of solid sections and hollow sections. Solid sections, in turn, are formed by smooth prismatic surfaces located perpendicular to the smooth and the perforated surfaces and are fixed to the smooth surface, and also by two, connected with them and inclined with respect to the smooth prismatic surfaces, surfaces of a complex shape having on the one side a smooth surface and on the other side – a toothed or a wavy surface. Vertices of the teeth or protrusions face the inside of these surfaces, and the surfaces themselves are fixed onto the perforated surface. To the smooth surface tridimensional sound-absorbing elements are attached, for example, in the form of tetrahedra.

EFFECT: invention makes it possible to improve the efficiency of noise suppression.

1 cl, 3 dwg