Have you heard ‘the hum’? Well thousands of us claim to. It is a low frequency ‘throbbing’ noise of around 20 hertz which seems to have an untraceable source and is incessant in its duration. It has become the bane of many ordinary people’s existence with many complaining that the hum has caused them to loose sleep through the frustration searching for the source of the dull drone. Interestingly in terms of the entire population, it is only a select few (some hundred thousand or so) who are able to hear it. A number of theories have been suggested as the possible source of the noise, from gas pipes and electricity pylons to the rather far-fetched theory that they are created by invisible flying saucers which are surveying mankind. All over the country from Bristol to Leeds, people have been filing complaints with their local council about noise pollution and have pleaded them to identify the source of the hum.
Now the vast majority of those who claim to be bothered by the hum are women over 50 years old. I know what you’re thinking, the main complainants seem to be women ‘of a certain age’ who may not possibly be entirely ‘all there’ when it comes to mental stability. But personally, I have not ruled out the existence of this strange sound quite yet. Since beginning my course at the University of Sheffield, I moved into a flat in the city centre. During my time as an undergraduate at York, and my childhood in the idyllic countryside of Devon, I had not come to experience the elusive noise. However after setting up camp in Sheffield I have been kept awake many times during the night due to a low humming noise, external to my room (I make a point to turn anything electrical off before I go to bed). Needless to say, earplugs were a wise investment and the sound vanished once I had jammed them in my ears – which goes a long way to proving the sound is not just a creation by my overactive brain.
So by my own admission (and testimony from thousands of others), the hum may well exist. But what is causing it? And more importantly, how do we stop it?
Well, a scientist from the University of Cambridge believes he has found an answer. Dr David Baguley claims it is simply a case of oversensitive hearing which is prevalent in only a small section of the population. He states that for these people, their hearing can be particularly sensitive during times of stress or anxiety and they can quite literally “hear a pin drop”. The hum stems from general background distortion which is pitched at a low frequency. The ears pick up the sound and then as the person becomes more and more aware and cautious of it, the sound is amplified and the brain becomes entirely focused on it. Baguley suggests the best way to get rid of the hum is simply to try to ignore it and eventually the brain will no longer process the sound.
This seems plausible and at least it confirms I’m not going mad. If anything, it may just indicate my hearing is a little better than most. Now where are those ear plugs?
If you would like to hear what the hum sounds like please visit: http://news.bbc.co.uk/1/hi/uk/8056284.stm