Was reading something bout Mach number = ratio of fluid velocity and speed of sound in tt fluid.
Came across subsonic aka infrasound.
Infrasound: Low pitched sound tt human cannot hear.
Impact: Can let human feel awe/fear/dizziness depending on the frequency.
Brown Note: A low frequency (btw 5 to 9 Hz) infrasound tt can cause human to lose bowel control. Hmm...
VERY SAD STILL.
SIGH.
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