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Device i.e. panel, for use at e.g. ceiling to absorb acoustic waves in e.g. conference hall, has textile coating supported by peripheral modular frame that includes groove maintaining removable central core i.e. perforated sheet
Device i.e. panel, for use at e.g. ceiling to absorb acoustic waves in e.g. conference hall, has textile coating supported by peripheral modular frame that includes groove maintaining removable central core i.e. perforated sheet
The device has a textile coating (5) supported by a peripheral modular frame (1). The peripheral modular frame includes a groove maintaining a removable central core (7) i.e. perforated sheet. The central core includes two types of through-openings differing from one type to another type by diameters between 3 mm and 8 mm. A part of a space between the textile coating and the central core includes a removable material layer (9) to absorb energy of an acoustic wave. The frame maintains the layer by the interior walls of an edge of the frame.
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