Posted: May 11, 2015 3:48 am
by Sovereign
I figured I'd put this here.

Back to ghosts. Studies show that infrasound between 7 and 19 Hertz can cause feelings of fear and panic in humans. Our eardrums pick up these sounds and transmit them to our brain without setting off our auditory sense. To study the effects of these sounds on human organs, researchers from the University of Hetfordshire conducted an experiment where they played music with and without tones of 17 Hertz frequency in the background. When the participants heard (or felt, rather) the music with the 17 Hertz tones, they felt nervous, anxious, and fearful. They also felt pressure on their chests and chills down their spine. These are the feelings that most people describe when they experience a paranormal event. It is suggested by the researchers who conducted these experiments that infrasound (sound below 20 Hz of frequency) is present at supposedly haunted sites. Upon examining the frequencies present at advertised haunted houses, researchers detected several wavelengths of infrasound being emitted. They hypothesize that these frequencies caused feelings of panic and dread among visitors (Sydney Morning Herald).

But what does being in the presence of infrasound have to do with feeling fear, anxiety, and nervousness? It may have something to do with natural sources of infrasound: volcanoes, earthquakes, tiger roars, and strong ocean waves. Our bodies may have evolved to detect the sounds that we cannot hear, and we may have evolved to fear these dangerous sounds. ... aranormal/

Edit: I put it in this section since the subject dealt with most of the post here.