Okay, Tex, I feel terribly guilty for not getting this done. The day after my above post was a day one of my housemates decided to have a study group. All day. \:\(

It's still on my list of things to do. I came across some info, though, that makes me think about this. The type of acoustic treatment I have is for something called modal ringing, which is something akin to echo--the old "clap your hands and listen" trick. Taming the ringing is not something one can measure with an SPL meter.

Things that make you go hmmmm. . .

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"Nothin' up my sleeve. . ." --Bullwinkle J. Moose