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Resonant modes and taming the room

I measured my listening room and calculated the room modes, and graphed them today. I was trying to determine if/where the resonant frequencies were too closely grouped. Ultimately I was pleasantly surprised by the fact that I do not show any serious problems.
My question though is, how can I tame the room to eliminate the areas of congestion in the modes I am experiencing? Are there differing approaches based on the frequency of the modes?
My room is L 22'-5" x W 12'-10" x H 6'-5". I was concerned about the low ceiling, but it appears to help in this application rather than hinder.
Any insight you might offer would be appreciated.
128x128nrchy
zaikesman
3,017 posts
 
I am a little surprised that your calculations didn't show any serious problems - given the fact that your room's measurements are very close to doubling each dimension, I would think some strong modes should exist.
newbee
4,751 posts
 
You can spend big bucks and experience a lot of frustration trying to eliminate dimensionally induceds nodes and still not succeed. It has been my experience that the only nodes that are important are the ones at the listening position. These can be controlled to some degree by speaker placement and listening position placement. A good CD with pink noise tones and a RS meter and graph paper will be of great help to you. There has been a lot of discussion on this subject on this site and on audioasylum - you might like to do a search and see what you can draw from the prior posts. As i recall they contained some excellent explanations and suggestions.
nrchy's avatar
nrchy OP
2,124 posts
 
Zaikesman, I had some congestion between 77 Hz and 83 Hz, but not again till I got out to about 178 Hz. I wish I could show you the graph so you could make some suggestions or corrections if I'm wrong.
It was the first time I ever tried this.
Newbee, thanks for the suggestions. I'm willing to work at it.
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