That said I recall many years ago having a conversation with Rudy Bozak (RIP) about extended very LF response and he related to me that the brown note myth was not a myth. I doubt he was pulling my leg, and I did not press him for details. My speculation is that it may have actually happened once to some unfortunate individual, and that story became legend. It does not strike me as a reliable or safe phenomenon.
Let's say for example that it did happen to somebody. Was it the actual freq/level that did it-or was it because that person was so "amazed" or needed to go anyway-------------
I know of a case that a female fan was allowed to touch the tour bus of her favorite country singer that she peed all over herself because she was so happy.
Maybe the same sort of thing. Just sayin'
I will say for fact-that even at moderate to low levels-low freq energy can make you feel a bit "weird" and some people very uncomfortable. We do it all the time-so much higher levels could be a real problem.
The interesting thing is that every time we let somebody listen to the Matterhorn, in the offices it is QUITE a bit more interesting than those outside the actual loudspeaker.
It seems as if the level is at least 10-20dB louder and all sorts of things start rattling/shaking etc. Yet you don't actually hear anything-but you do "sense" it.
When you stand outside the cabinet-it sure doesn't seem as if it that loud or that sort of thing would be happening.