Shopping malls have long been plagued by anti-social teens loitering around entrances being generally disruptive to mall visitors and shop owners. Malls and local police have tried to prevent these 'hang outs' through a variety of methods, including curfews and ID/age checks at mall entrances. Actions that have only offered temporary respite and no lasting effects. However, this may be a problem of the past, thanks to a small device called the Mosquito.
Howard Stapleton, managing director of
Compound Security Systems Ltd, and the inventor of the Mosquito, says the idea first came to him as a child when he was irritated by a high-pitched noise while visiting a factory with his father. Children can hear sounds at higher frequencies than adults do — a condition known as presbycusis.
The Mosquito creates loud pulsating ultra-sonic tones that can only be heard by under 20 year olds. The CSS website says that teenagers are acutely aware of the Mosquito and usually move away from the area within just a couple of minutes.
The
BBC reports that the device has been field-tested at the Spar convenience store in Barry, South Wales, where dozens of teenagers used to gather just outside the door being rude and disturbing customers.
Robert Gough, who, with his parents, owns the store, said "On the low end of the scale, it would be intimidating for customers, on the high end, they'd be in the shop fighting, stealing and assaulting the staff."
Stapleton gave him a Mosquito for a free trail.
Gough installed the device without saying anything to the teenagers and they immediately began to complain about it. "They were literally begging me to turn it off." He stood his ground, but avoided confrontations by telling them it was to keep the birds away because of the bird flu epidemic. The kids waited a bit for their friends while covering their ears, then left.
According a
C|Net report, Stapleton used his children as guinea pigs and tried a variety of noises and frequencies before settling on a pulsating tone around 16KHz that can be broadcast at 75 decibels, within government safety limits. "I didn't want to make it hurt," Stapleton said. "It just has to nag at them."