Would be interested to see people's reactions to how they feel after listening to 18.98 Hz sound (this was on The Project last night, but I have been aware of it for a while).
This is supposedly the Ghost Frequency - it is an intrasonic frequency just below MOST people's hearing range (I CAN hear it), that causes resonance in the eye and the frontal lobe of the brain. It is this phenomena that seems to help explain a lot of the "Ghost" sightings and the like, and is associated with a lot of natural phenomena like earthquakes/tsunamis and other tectonic occurences. IT is a frequency that seems to alert and alarm most animals too, causing them to flee the oppsoite direction to the sound source.
Here is a sample:
https://www.youtube.com/watch?v=h-zM3qAzBaw
I listened to it over several weeks randomly, and even had the wife play it randomly so that I was not pre-tuned to it.
My personal reaction was immediate ear pressure, my eyes if closed tended to turn toward my nose (if open, the brain stops this), and if played for more than a minute, I start getting frontal lobe pain on both sides. I did never feel emotional or doom and gloom, but it definitely engendered some feeling of slight confusion as to WHAT was going on. As I mentioned, I CAN hear it (however faint it is, but definitely can), and a small percentage of others can too.
Test it yourself, let us know your response. Just ignore all the voodoo associated with it.