New research suggests that infrasound—low-frequency sound waves below human hearing—may explain creepy sensations often ...

Hz infrasound, though inaudible, spikes cortisol and triggers irritability, explaining "supernatural" feelings in old buildings.

2003-02-24 04:00:00 PDT Denver-- In rumbling tones far lower than the sounds that human ears can hear, a symphony of mysterious noises constantly assails the entire globe, and scientists are learning ...

Experiments with infrasound have revealed a potential connection to paranormal experiences such as haunted houses and ...

New research uncovers a possible cause for feelings linked to paranormal activity: sound too low to hear that still stresses ...