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Jay, it is remarkably unremarkable, unlike the example in MHOA which claims a dramatic reduction in the mode by one trap only. We may be sruggling with possible inadequacies of measurement here. I may call over a friend with FuzzMeasure 3. If this experiment shows some promise I would be prepared to consider an array. I can get these tubs free.
I am intrigued by your comments about location of the device. I assumed the best place for the Tub was in a back corner where the SPL of that room mode is highest. Note this experiment is all about empirical. I hit the room with 34Hz and found, as expected, a null in the room centre, very high level at the back, more so in the back corners. I assumed that is the best place for the TUB. Do you have a suggestion for another, maybe better, location?
DD
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