I once used 4" pvc to make a single pipe, pipe organ that resonated on that frequency.
Made everyone around crazy (except me, I knew about it and ignored the crazy stuff).
I think it's 14 hz that resonates best with the human gut and causes spastic evacuation.
I would never build anything like that.... more than once.
/johnny
A hot to primer on super villany..
Lol.
“Allow me to introduce you to the pipe organ of pain!”
Yes, horrible mental images came to mind.
I think it’s 16 hz that makes your brain take a vacation into surrealville.
Build it into the house structure as a tier of home defense.
You may get hired on with Project X (xylophone) with the State Science Institute with that experience.
Sound can kill. Sound and vibrations are much more powerful than is commonly thought, music being one prime example, evoking chemical tears (not onion tears) and laughter with zero visual suggestion. Sound would be a very sure, swift, and effective way to enslave a human populace. One other thing .. the body is mostly water; the frequency vibration of those sounds plays your body the same way frequency vibrations move a violin string. There is no “ignoring” them unless you remove your mind from your physical body.