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Acoustic treatment

I want to build my own bass traps and was wondering if there are any other alternatives to fiberglass and rokwool. Foam is not a consideration as I don't believe it has the necessary qualities for absorption. I have heard of cotton batting, does anyone have experience with this material. The idea of fiberglass makes me itch just thinking about it, but I'm resigned to using it or rokwool if that's all I have.  Please make suggestions and let me know your experiences.

Thanks
Mike
zardozmike
bdp24's avatar
bdp24
9,715 posts
 
Quite right, GK. If you score some of the old Tube Traps (before ASC starting marking them) as I did (a guy advertised them in The Recyler in L.A. in the 90's---ten bucks apiece, for 13 of 'em, 9", 11", 16"!), the seam side is the absorptive side, directly across the tube the reflective. By the way, the Room Tune is just a piece of fiberglass insulation covered in grill cloth, nothing magical (unlike the ASC Tube Trap, which is a relatively highly-engineered product).
geoffkait's avatar
geoffkait
23,365 posts
 
From somewhere in cyberspace,

“We subsequently purchased the lot of lightweight frames and took them home with us and used them for many years. The idea behind the Room Tune was nothing new: a reflective membrane on one side and an absorptive material on the other.”

bdp24's avatar
bdp24
9,715 posts
 
That reflective "membrane" in the Room Tune is the foil side of the fiberglass insulation. High tech! ;-)
geoffkait's avatar
geoffkait
23,365 posts
 
Pretty smart!
bdp24's avatar
bdp24
9,715 posts
 
Pretty high profit margin!
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