Some people hear a persistent hum that nobody else notices. Researchers investigated the mystery and found a surprising possible cause.

Add Yahoo as a preferred source to see more of our stories on Google. Dr Glen MacPherson works in Vancouver (Rex) Tens of thousands of people around the world hear ‘The Hum’ – a mysterious, low, ...

Low-frequency noise annoyance has been reported worldwide over several decades – so much so, there is now a global hum map and database Name: The Omagh Hum. Age: It was first reported in late October.

In the June 3 issue of The Week magazine, there is an article on The Hum. There are 5,000 data points on the World Hum Map.