Ghosts, Feelings of Dread caused by Infrasound?

This was interesting.

Scientists created extreme bass infrasonic waves, and test subjects reported feelings of dread and revulsion, similar to what many ghost and spectre witnesses report feeling.

I've had my own ghostie experiences.

Being the contrary sonofagun I'll be...how do we know it's not the ghosts that create the subsonic soundwaves? Huh?

It's an interesting point, and it could also be used to explain feelings and experiences people have felt in religious experiences, too, as Warren points out.