hey /x/, i've been experiencing some really scary shit like seeing ghosts and demons everywhere, is this normal???
"In A Nutshell
It’s called infrasound: This refers to a sound which has a frequency lower than 20 khz. This frequency is at the very bottom of the typical human range of hearing, and while it may not always be processed as sound, the body certainly registers it unconsciously. This can lead to some very strange reactions and may be linked to ghost sightings."