Originally posted by Ethan Winer:
Blair,
Your instincts are correct. If you paint or apply other reflective material on rigid fiberglass it will still absorb low frequencies but reflect higher frequencies. This is a good way to ensure that rigid fiberglass panels do not kill all the ambience in a room. Of course, most rooms need some amount of mid and high frequency absorption too, so you shouldn't cover all of the panels.
--Ethan
1) Is there some formula or guideline to figure out where the panel will stop relfecting and start absorbing if I apply paint or other surfaces?
2) Will the panel become "tuned" to a certain frequency by applying other surfaces or will it remain broadband at low frequencies? I can imagine this might be the case if I were to put "peg board" over the panel, but what about paint? Will the coat of paint resonate at a certain frequency depending on the thickness, or is this not going to be an issue?
