For thousands of people around the world it starts out as a low-level vibrational buzz, but the sound that becomes a persistent annoyance for many is not heard by everyone.
For thousands of people around the world it starts out as a low-level vibrational buzz, but the sound that becomes a persistent annoyance for many is not heard by everyone.
A new theory behind The Hum phenomenon reported by only some people in Sydney and around the world abc.net.au - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from abc.net.au Daily Mail and Mail on Sunday newspapers.