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RE: How to treat a low, reflective ceiling?

Posted by Tobias (A) on May 6, 2012 at 12:00:46

In Reply to: How to treat a low, reflective ceiling? posted by Terry on April 26, 2012 at 13:40:41:

My 2 cents:

I like the l and w dimensions of your room but the height is problematic. It requires absorption and you don't have a lot of height to give up to that. Also, that height is exactly half the room width. There will be a common room mode in the 40 - 45 Hz range ( plus the doubled frequencies ) because of that.

So between the floor and the ceiling ( for my 2 cents, again ), you would need something that has excellent absorption in the 40 Hz range and up, but doesn't take up much vertical space.

A very thick carpet, a shag for example, would do good but it would not deal with the low end of the range you need to control.

I have hung a 1/4-inch thick woven wool rug in my own listening/living room. It hangs about 9 inches down from the sheetrock ceiling, but that's because luckily I have over 9 feet in that dimension.

Wool is a great absorber, and it works down into the low end if it is spaced away from the surface behind it. You might get a worthwhile correction with 4 inches of spacing, which would leave you just over 6 1/2 feet of headroom.

A panel like that would not need to cover most of the ceiling, only about the central 25 to 40 square feet.

Just an idea, which I have not tried in a room with a ceiling lower than 9 feet, and it would still have to be accompanied by bass trapping in the room corners, absorption in the width dimension and perhaps a rug on the floor. However it is an idea which might just work with that tricky ceiling height.

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