Long story short I ended up acquiring a bunch of home-made acoustic treatment but the maker of such treatment was not the seller, and the seller did not know anything about the specs.
The rigid fiberglass panels are easy enough to look at and know about, but there are 2 huge, heavy, what look to be membrane bass traps. I'm curious to figure out what frequency they are tuned to.
My best guess is to attach a piezo transducer to the surface and drive it with a speaker doing a frequency sweep, then look for a spike in the piezo output.
Any better suggestions?
Thanks -
Freq. ID for membrane bass traps
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