COMBINED SOUND-ABSORBING PANEL Russian patent published in 2017 - IPC E04B1/82 G10K11/168 

FIELD: construction.

SUBSTANCE: panel is described, made in the form of a volumetric shell structure, which comprises an outer surface facing soundproof air-impermeable or sound-transparent air-blown film, foil, fabric, or non-woven fabric layer and/or an installed outer facing translucent structural element, the inner cavity of the volumetric shell structure is filled with a sound-absorbing substance formed by isolated crushed fragmented sound-absorbing elements, wherein in the inner cavity of the volumetric shell structure, filled with a sound-absorbing substance formed by isolated crushed fragmented sound-absorbing elements, there are hollow moulded cavity reservoirs in the form of communicating chamber and throat parts of Helmholtz acoustic resonators, while the walls of the chamber and throat sections of the Helmholtz acoustic resonators are lined with an airtight film elastic sound-proof shell adhesive-fastened from the inside on the surfaces of the hollow moulded cavity reservoirs forming the communicating chamber and throat parts of the Helmholtz acoustic resonators.

EFFECT: improvement of sound-absorbing properties.

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