Police are investigating complaints after a man installed a device, more commonly used by shops to disperse young people, on his house.
Colin Martin said he bought the gadget for his home, in the Cadoxton area of Barry, south Wales, after years of anti-social behaviour and that he had not had a problem since.
But residents said the device, known as the Mosquito, was driving away innocent children. The Mosquito emits a high-pitched sound which causes discomfort to young ears, but is above the normal hearing range for most people after they hit their 20s.
And where can I get one of those Mosquito thingys?