MULTI-LAYER SOUND-INSULATING STRUCTURE Russian patent published in 2015 - IPC E04B1/82 

FIELD: construction.

SUBSTANCE: multi-layer sound-insulating structure comprises several alternating plates from serially connected layers of sound-absorbing and sound-insulating material fixed on a vibrating solid surface, an outer decorative panel. In sound-absorbing and sound-insulating layers there are holes, where vibration insulators are placed, fixed between the oscillating solid surface and outer decorative panel with provision of the gap between the oscillating solid surface and the first sound-insulating layer. Sound-insulating layers are made of a material with density and coefficient of losses of acoustic oscillations energy, exceeding density and coefficient of losses of acoustic oscillations energy of layers from sound-absorbing material. The outer decorative panel is made of two layers identical in thickness, and in the interval between which there is a vibration absorbing material, for instance, sand filling, which is stiffly glued to decorative panel layers. Decorative panel layers are joined to each other by threaded elements.

EFFECT: invention makes it possible to increase efficiency of sound insulation of a multi-layer sound-insulating structure.

1 dwg