ACOUSTIC STRUCTURE FOR PRODUCTION PREMISES Russian patent published in 2009 - IPC E04B1/84 

FIELD: construction.

SUBSTANCE: invention is related to industrial acoustics, in particular to wideband noise suppression and may be used in all branches of national economy as a protection facility against noise. Acoustic structure of production premises includes window openings and acoustic barriers in the form of section-assembled acoustic noise-suppression panels that are made of frame arranged in the form of parallelepiped, which is created by front and back walls of panel, every of which has (in section) "П"-shaped form, and sound-absorbing material. Acoustic structure comprises piece sound absorbers, vibration-insulating supports for installation of equipment, vacuum sound-absorbing dual-pane windows for window openings. Front wall of acoustic noise absorbing panel has slot perforation, perforation coefficient of which is accepted as equal to or higher than 0.25. Walls of panel are fixed to each other by vibration-damping covers, besides ratio of frame height h to its width b is the optimal ratio of values: h/b=1.0…2.0. Ratio of thickness s' of frame assembled to its width b is the optimal ratio of values: s'/b=0.1…0.15, ratio of thickness s of sound-absorbing element to thickness s' of assembled frame is the optimal ratio of values: s/s'=0.4…1.0. Sound-absorbing material used is represented by mineral wool boards on basalt basis, or mineral wood boards, or basalt wool boards, or glass fiber boards with glass-felt lining, or foamed polymer boards, for instance from polyethylene or polypropylene. Sound-absorbing element along its whole surface is lined with acoustically transparent material, for instance glass cloth of "ЭЗ-100" type or polymer.

EFFECT: higher efficiency of noise suppression.