Replies

1. 
   Michael Chandler | Nov 18, 2009 06:17pm | #1

   If you are looking for acoustic conditioning to reduce re-verb for a recording studio you can build a bass trap to minimize the boominess and a refractive phase grating to improve presence.

   For sound absorption the California Manual of Sound Transfer Coefficients for Building Assemblies can give you a lot of good information. A double-stud wall with 1" air space between the studs and rock wool insulation between the studs with a one inch air space between the insulation batts works well if all flanking paths are addressed with low-VOC sealant (Bostik Home makes a good one)

   I hope this gives you a good start. I may have some old drawings around here somewhere. It's been a while since I built recording studios and I don't know where my STC book has gotten off to so I probably have the title wrong on that.

2. 
   Danny Kelly | Nov 18, 2009 06:18pm | #2

   Acoustiblock - kind of expensive but a very good product and 100% recyclable.
   http://www.acoustiblok.com/

3. 
   Riversong | Nov 18, 2009 10:34pm | #3

   If you'd really like "eco-friendly" materials, you might consider a thick coat of earthen plaster (clay, sand and chopped straw), with perhaps a top coat of lime, sand, horse manure plaster (no shit, it makes a wonderful finish). Lots of sound-attenuating mass and good surface texture to break up reverb.

4. 
   Anonymous | Nov 19, 2009 09:08am | #4

   I've heard that audimute also has eco-friendly products...their sheets are supposedly made with cotton and recycled paper and their insulation product is made from old tire rubber..i saw their videos on youtube..might be worth checking out?