ACOUSTIC DISSIPATION ELEMENTS FOR OPERATIONAL BUILDINGS Russian patent published in 2012 - IPC E04B1/74 

FIELD: construction.

SUBSTANCE: the invention relates to industrial acoustics, specifically to broadband acoustic suppression. The acoustic dissipation elements contain a molded wall and a perforated wall with an acoustic dissipation layer between them. The acoustic dissipation elements contain a carcass, window openings, door openings, openings for lighting placement and acoustic protection in the form of molded walls and perforated walls with an acoustic dissipation layer between them. The floor has elastic foundation and contains a foundation platform made of concrete reinforced with oscillation dampening, which is installed on the foundation plate of the floor deck with cavities in oscillation dampening and water-proof materials with a gap between it and the bearing wall of the operational building. The cavities of the base plate are filled with oscillation dampening materials, such as foamed polymer. The acoustic dampening elements are installed in two layers. The first layer is more tough, it is solid and molded, with a complex profile consisting of inclined planes oriented down and connected with horizontal planes which have resonance holes. The second layer is soft, non-continuous and positioned below the sound-reflecting surfaces of the first layer. The solid profiled layer of the acoustic dampening material is made of material which has acoustic reflectivity coefficient greater than its own acoustic absorption coefficient. The acoustic dampening elements installed above the most noisy equipment contain a carcass hung by hooks, for example, by cable wires, or fixed directly to the tough wall or the ceiling of the operational building. The carcass is wrapped in foil on the outside to prevent dust accumulation. A reactive resonance piece is fixed to the bottom of the carcass, the piece is divided by walls with holes which function as Helmholtz resonator inlets, installed in series. The active part of acoustic dampening elements is a cavity between the carcass and the piece, filled with acoustic absorbing material. It is filled with acoustic absorbing non-combustible material, such as vinypore, fibreglass, with a protective layer of glass fabric.

EFFECT: improved acoustic dampening.

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