Good Materials for Curtains

Probably not talked about much due to the fact that most men don't get to choose - WAF rules. :-) But if I wanted to deaden the sound I would use lined wool. If I wanted to reduce the sound, as in making it diffused, about any other materiel would do so long as its not sheer.

I asked a similiar question back in Jan./03....this was Richard from Rives Audio reply

01-11-03: Rives
Hunter vertical blinds makes a Honey comb. It works quite well for some absoption and diffusion. For absorption heavy natural fiber of two different types, have a liner of heavey loose woven material like denium or wool and a lighter fabric on the outside. You need a gather of about 50% when the drapes are closed. This will work quite well. Short of replacing the inserts in the glass there is little you can do about the bass leakage.
Rives (Threads | Answers)

I put up some velvet curtains on the front and side walls and they seem to have eliminated enough of the early reflections to increase focus, depth and imaging quite noticeably.