Anyone see the noise box that doesn't make a noise on Richard and Judy [shock]

[JoolsToo]

this box that makes an inaudible sound to most people but apparently teenagers can hear it. It can make you feel nauseous and they want to use to stop kids causing trouble in shopping malls and the like. They tested it on a girls choir who were in the studio and within seconds (although we couldn't hear anything) they had to put headphones on and said it was horrible!

Could be a great bit of kit!

[starlover]

how strange... not very fair on teenagers who happen to be around and not causing trouble though! lol

is it like those cat scarer things? ours says it is inaudible to people but my mum and i can both hear it... so can the postman! lol