<html> If you have forced air heating, acoustic ducting is available,  After building our studios, we soon found out that most of the inter studio noise problems, was coming from the ducting. The ducting is a big concertina like hose, with insulation wrapped around it.   The outer and inner covering looks like a zinc impregnated fabric.   The walls were constructed with 2 X 6 framing, using steel studs off set on each side. Bat insulation was woven between the studs,Polystyrene was used for caulking around the framing.   two sheets of gyproc was applied on each side of the wall for rigidity.  We used a glass window through the wall into the common area. The studios are practical so far as noise is concerned.   Are they sound proof? No. But they are better than our University practice studios, and do not interfere with teaching operations.  Pay close attention to the ceiling.  We took the walls to the ceiling of the structure, then installed a drop ceiling, with bat insulation above it. Regards Roger At 12:28 AM 8/7/02 -0600, you wrote: <blockquote type=cite class=cite cite>Hi Ron, I agree about the choice of materials--but cost does enter into this too. At 10:17 PM 8/6/02 -0500, you wrote: > >>Fiberglass increases the effective "size" by a multiplier of approximately >>1.6 so your 6 inch wall "acts" like about a ten inch one. Separate plates >>rather than one six inch one isolated from each other. Do it right the >>first time! > > From what I've read, a closed cell foam, mass loaded vinyl, or lead >sheeting is more effective than fiberglass. But that's just what I've read. > > >Ron N > > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. <a href="mailto:pianotuna@accesscomm.ca" eudora="autourl">mailto:pianotuna@accesscomm.ca</a> <a href="http://us.geocities.com/drpt1948/" eudora="autourl">http://us.geocities.com/drpt1948/</a> 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner </blockquote> </html>