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bass trap membrane question

174.101.113.11

stator_99@yahoo.com

I have been thinking about making some DIY bass traps with 24" X 48 " 4 " thick Ownens Corning OC 703 panels and 1" X 2 " wood framing with a burlap covering. I read on here once that this design will perform better if you cover the fiberglass panel with a thin sheet of plastic.
I was wondering......various home improvement stores sell kits for installing interior storm windows, these come with a fold out sheet of very thin plastic and two side adhesive tape, once these are installed you apply heat with a hair dryer and the film shrinks to a tight wrinkle free, air tight state. Would it work OK to apply this tape to the wood frame of a bass trap and encapsulate the front and sides of the fiberglass panels with the storm window film and then heat shrink it with a hair dryer?

Follow Ups:

RE: bass trap membrane question - Jon Risch 20:36:31 10/21/09 (0)
See my posts at:

http://www.audioasylum.com/audio/tweaks/messages/16/166045.html
and
http://www.audioasylum.com/audio/tweaks/messages/16/166078.html

and more to come later.

Short answer, placing some plastic sheet on a 2X4 foot fiberglass panel does not necessarily a bass trap make.
Jon Risch
RE: bass trap membrane question - crossram2x4@aol.com 22:43:31 10/14/09 (0)
Use OC 705 (see link below) - FRK (faced) for the front 2" layer and non-faced for the rear 2" layer. 0.7 mil painter's drop cloth (available everywhere) attached to the outer panel with spray adhesive works fine for the limp membrane.
- http://www.ethanwiner.com/density.html (Open in New Window)
Consult Jon Risch's pages - bartc 18:24:31 10/14/09 (0)
He wrote (as I recall) that bass traps might work best with a thin plastic membrane - about the same as dry cleaner bags - on one side. That way you could sort of tune the amount of HF reflected from the trap.

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