Originally Posted by Martycool007
Hey guys. I am considering putting curtains in my theater room, and would like to hear from some of the folks with more knowledge of room acoustics to decide if this is a good idea. My primary concerns are;
1.) will this affect the rooms acoustical properties, & if so, how?
Curtains generally absorb well at high frequencies, and absorb poorly at low frequencies.
2.) should I just cover the side walls or all 4 walls?
Generally absorption works best on surfaces opposite the sound source, and then on surfaces that a close to sound sources. It is best to do acoustical measurements to guide your placement of acoustical materials.
4.) I might be up for DIY'ing some curtains, so if I go that route, how should this be done, what type is fabric should I use, and would they be made just like normal curtains, or should I add something like closed cell foam to the backs?
Generally speaking absorptive materials work best, the wider range of frequencies that they absorb well.
Last but not least, 5.), I currently have two 2' by 4' absorbsion panels on each wall made out of two layers of 2" OC703. Will adding curtains take away the need for these panels? Or should I keep the panels up and put them behind the curtains?
Those absorption panels generally have more ideal absorbtion properties than any curtain is likely to have. If you place the absorption panels in front of or behind the curtains or next to them, they will continue to work well.
This project is not for acoustical benefits, although any acoustical benefits would be welcome, this project is mostly for aesthetics. I just want to make sure that I won't be harming the rooms acoustics, or harming the benefits of my absorption panels. Any advise would be greatly appreciated!
Usually absorbing high frequencies without absorbing low frequencies tends to make a room sound boomy and dull. You may find it desirable to put absorption panels behind the curtains to alleviate this. Or you may want to use acoustically transparent curtains to leave the room's acoustics more like they were.