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For decades, hundreds of people worldwide have been plagued by an elusive buzzing noise known as "the Hum". Some have blamed gas pipes or power lines, others think their ears are faulty. A few even think sinister forces could be at work.
"It's a kind of torture, sometimes you just want to scream," exclaims retired head teacher Katie Jacques.
Sitting in the living room of her home in the suburbs of Leeds, the 69-year-old grandmother describes the dull drone she says is making her life a misery.
Most visitors hear nothing, but to Katie the noise is painful, vivid and constant.
"It has a rhythm to it - it goes up and down. It sounds almost like a diesel car idling in the distance and you want to go and ask somebody to switch the engine off - and you can't."
Katie says she no longer has any quiet moments and getting a good night's sleep has become impossible.
"It's worst at night. It's hard to get off to sleep because I hear this throbbing sound in the background and you know what it's like when you can't get to sleep and you're tossing and turning and you get more and more agitated about it."
Katie first became aware of the maddening rumble two years ago. She turned everything electrical off at the mains, but that made no difference. Neither did her efforts to block out the sound with ear plugs, or smother it with music.
Some believe the noise comes from gas pipes, power lines, traffic, factories, pylons or mobile phone masts and the phenomenon has been reported from Vancouver in Canada to Auckland in New Zealand. Sufferers complain of sleep loss, headaches, sickness and nosebleeds.
In the 1970s it became known as the 'Bristol hum' after 800 people in the city claimed they could hear it.
But following years of research, scientists now say it is probably the result of over-sensitive hearing.
Dr David Baguley, head of audiology at Addenbrooke's Hospital in Cambridge, said a third of cases can be tracked down to an environmental source.
He told the BBC: "It may be a fridge or an industrial fan or a piece of heavy machinery at a nearby factory that is causing the disturbance and can be switched off."
Dr Baguley claims people have an internal volume control which helps us amplify quiet sounds in times of threat, danger or intense concentration.
"If you're sitting by a table waiting for exam results and the phone rings you jump out of your skin. Waiting for a teenager to come home from a party - the key in the door sounds really loud. Your internal gain is sensitised."
According to Dr Baguley, the problem comes when an individual fixes on a possibly innocuous background sound, and this act of concentration then triggers the body's "internal gain", boosting the volume.
"It becomes a vicious cycle," he explains. "The more people focus on the noise, the more anxious and fearful they get, the more the body responds by amplifying the sound, and that causes even more upset and distress."
Dr Baguley is now working with acoustic researchers from the University of Salford to try and find a solution to the problem.
Originally posted by interestedalways
Lately when I go out at night for my cigarette, I have heard a pulsation added to the hum, at first I thought it to be my neighbors air conditioner, but as it kicked off and the pulsating hum continued, I have decided something has been taken to another level.
Originally posted by tarifa37
Originally posted by interestedalways
Lately when I go out at night for my cigarette, I have heard a pulsation added to the hum, at first I thought it to be my neighbors air conditioner, but as it kicked off and the pulsating hum continued, I have decided something has been taken to another level.
That is interesting, are you still hearing it?Are you in a built up area or rural?
Originally posted by jkrog08
reply to post by tarifa37
Well do you live next to any powerlines or stations?