https://www.youtube.com/watch?v=EuRBM0i8mbI&feature=player_embedded
Mysterious hum driving people crazy around the world
Who hears the Hum?
Only about 2 percent of the people living in any given Hum-prone area can hear the sound, and most of them are ages 55 to 70, according to a 2003 study by acoustical consultant Geoff Leventhall of Surrey, England. Most of the people who hear the Hum (sometimes referred to as "hearers" or "hummers") describe the sound as similar to a diesel engine idling nearby. And the Hum has driven virtually every one of them to the point of despair. [Video: Listen to 6 Spooky Sounds] "It's a kind of torture; sometimes, you just want to scream," retiree Katie Jacques of Leeds, England, told the BBC. Leeds is one of several places in Great Britain where the Hum has recently appeared."It's worst at night," Jacques said. "It's hard to get off to sleep because I hear this throbbing sound in the background. … You're tossing and turning, and you get more and more agitated about it." Read more at: http://www.nbcnews.com/science/mysterious-hum-driving-people-crazy-around-world-6C10760872