People in Omagh say they are fed up with a persistent humming, which is disrupting their sleep.
The night-time noise has been reported in a wide area of the County Tyrone town in recent weeks.
Fermanagh and Omagh District Council’s attempts to trace it have so far not been successful.
Now, noise experts could be called in by the council as it struggles to find the source of the mystery hum.
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A phenomenon known widely as “the Hum” has been reported across the globe over the past five decades, including in the UK, North America and Australia.
There is a range of theories as to where such noises come from, including farm or factory machinery, while some subscribe to conspiracy theories such as flying saucers
For the wider phenomenon, see: The World Hum Map and Database Project
I heard this once back in 2011 while driving alone through the country at night. Just a weird, pulsing hum. Then it vanished just as quickly as it started. It’s funny that people have been studying it for so long and still have no idea what causes it.
Some mystery hums have been tracked down to a source but it can be tricky as the sound travels quite a long way.