Acoustic room panels begin with bookcase panel. This will be about 2 inches thick and triple ply manufactured with fabric, acoustic wadding then backing material.
C64E00B1-93DF-4785-9444-793CEE677770 by y, on Flickr
Nearly finished....
BFB49C7A-93D9-4D6C-B003-5D816FA74445 by [url=https://www.flickr.com/photos/162281319@N03/]url], on Flickr
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