http://www.bondedlogic.com/pdf/acous...spec-sheet.pdf
There appear to be a few companies like the one above that supply recycled cotton acoustical panels.
For purposes of reducing reverberation time in a say 35x40 foot meeting room, these kind of cotton panels would seem to have these advantages: 1) cotton instead of fiberglas or rockwool; 2) no need to wrap in fabric; 3) glued to wall without building a frame; 4) available in choice of colors. If you will, they appear to be a "glue and stick on the wall" type of option instead of building a frame for OC703 and then wrapping it in fabric.
The problem is these cotton panels are special order in my area. I haven't seen them in person. So I'm asking for your thoughts on them.
Does the cotton flake off if people brush up against them? Do they collect a lot of dust from the HVAC system? Can the dust be removed with a vac without damaging the panel? Do they adhere to the wall well? Do they tend to fall off after a period of time? Are they excessively floppy compared to OC703 if glued directly to a wall? Do they loose a lot of fibers and make a mess? Are they cost effective? Any other thoughts on them?
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