mosquito_logo-200To view a Health & Safety Executive Report on the effects of High Frequencies on Human Hearing. Click Here.

Are gatherings of teenagers and young adults affecting your business and your profits?

The Mosquito ultrasonic teenage deterrent is the solution to the eternal problem of unwanted gatherings of youths and teenagers in shopping malls and around shops. The presence of these teenagers discourages genuine shoppers and customers from coming to your shop, affecting your turnover and profits.


Acclaimed by the Police forces of many areas of the United Kingdom, the Mosquito ultrasonic teenage deterrent has been described as the most effective tool in our fight against anti social behaviour. Shop keepers around the world have purchased the device to move along unwanted gatherings of teenagers and anti social youths. Railway companies have placed the device to discourage youths from spraying graffiti on their trains and the walls of stations.

With an effective range of between fifteen and twenty meters field trials have shown that teenagers are acutely aware of the Mosquito and usually move away from the area within just a couple of minutes. The system is completely harmless even with long term use. The Times newspaper in England reports that the device was first used at a Spar shop in Barry, South Wales, where the owner Robert Gough was enthusiastic about the device’s success in driving away the local youths. “Either someone has come along and wiped them off the face of the earth, or it’s working” he is quoted as saying.

It seems that there is a very real medical phenomenon known as presbycusis or age related hearing loss which, according to The Merck Manual of Diagnosis and Therapy, “begins after the age of 20 but is usually significant only in persons over 65″. It first affects the highest frequencies (18 to 20 kHz) notably in those who have turned 20 years of age”. It is possible to generate a high frequency sound that is audible only to teenagers.

Is your business suffering from anti social youths driving your customers away?

Are you bothered by crowds of teenagers hanging around your street or business and making life unpleasant?

Mosquito ultrasonic deterrent can solve your problem.

The Mosquito is a non-invasive device that has been specifically designed to disperse groups of teenagers who may be loitering in areas where they could prove to be a nuisance. Whilst most young people are law-abiding and cause no problems, the presence of certain groups of teenagers can often discourage genuine customers from entering shops and other premises with a subsequent detrimental effect on turnover and profits.

The Mosquito ultrasonic deterrent produces a signal close to the limit of hearing in people up to the age of 25 years. Although the sound is not painful it does become highly irritating after five to ten minutes exposure. The result is that the majority of under 25s leave the immediate area, while those over 30, because of natural hearing loss, will be unaware of the noise. The system is totally safe even after prolonged exposure.


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Mr & Mrs R.M. Williams T/A Crosby Intruder Alarms

Crosby Intruder Alarms
20 Endbutt Lane, Crosby
Liverpool, L23 0TR
Tel: 0800 917 1441
Fax: 0844 589 6912