Swamp40 didn't google for "20 hz" they googled for '"20 hz" ghosts'. Every link I looked at in the results was about infrasound and how it causes a feeling of u

Swamp40 didn't google for "20 hz" they googled for '"20 hz" ghosts'. Every link I looked at in the results was about infrasound and how it causes a feeling of uneasiness and perception of supernatural things going on.