[Flash 9 is required to listen to audio.]
Neil DeGrasse Tyson talks about infrasound as a possible source for “ghost” sightings and other odd apparitions on StarTalk.
“Infrasound” is sound below 20 Hz (the limit of human hearing). It turns out that sound at 19 Hz can cause the human eye to resonate, matching the vibration of your eye tissue to the sound. This causes images that aren’t really there to appear in your vision … so are ghosts just super-low frequency sounds?
Hmm …
Source: soundcloud.com
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