SOUND-INSULATING CASING WITH THE AERODYNAMIC ACOUSTIC SUPPRESSION SYSTEM Russian patent published in 2018 - IPC E04B1/82 G10K11/16 

FIELD: acoustics.

SUBSTANCE: invention refers to the sound insulation of equipment with broadband acoustic suppression means, and can be used in all sectors of the national economy as the means of noise protection. Technical result is achieved by the fact that the soundproofing casing with the aerodynamic acoustic suppression system is made in the form of the rectangular parallelepiped, which covers the process equipment, the process equipment is installed on at least four vibration-proof supports, which are based on the bridging of the building, with the clearance between the base of the process equipment and the cutoff in the lower face of the rectangular parallelepiped, in order to reduce the aerodynamic noise of the ventilation system, the noise mufflers are installed in the casing, they are installed respectively on the inlet and outlet ventilation ducts, 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 the multilayer sound-absorbing structure, which is characterized by the fact that the noise silencers, which are installed respectively on the inlet and outlet ventilation ducts are made to be tubular, each silencer comprises the cylindrical body, which is rigidly connected to the end inlet and outlet nozzles, the sound absorber disposed between the cylindrical body and the perforated element, and an acoustically transparent material, placed between perforated element and sound absorber, and the sound absorber is made in the form of the sound-absorbing element of the annular type and in the axial section it is made in the form of the ring, the walls of which are made in the form of rigid and perforated walls, between which two layers are arranged: sound-reflecting layer, adjacent to rigid wall, and sound-absorbing layer, which adjoins the perforated wall, wherein the sound reflecting material layer is made from a complex profile consisting of evenly distributed hollow tetrahedrons, allowing to reflect sound waves incident in all directions, and basalt based mineral wool is used as the sound absorbing material of the Rockwool type, or mineral wool of the URSA type, or basalt wool of the P-75 type, or glass wool with glass wool lining.

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

1 cl, 4 dwg