Do You Have Super Hearing?

The 'Mosquito' sonic deterrent device was installed by the Wyvern Theatre in an attempt to stop groups of up to 100 youngsters from gathering around Theatre Square.

Crime Reduction Officer Bob Walton elaborated further: "Effectively, it's a transmitter which sends out a specialised frequency noise which according to the manufacture is particularly audible to young people under the age of 25.

He said: "I'm in my fifties and when it's turned on all I can hear is a very faint buzz. But I understand from young people who have been exposed to the noise, it is very annoying."

Swindon's anti-social behaviour co-ordinator Cheri Wright says it is working well.

She said: "We had a meeting with local retailers arounds here - after it had been installed for around three weeks - and feedback was really positive.

"Everyone was saying there has been a marked reduction in criminal damage and problems with the shops, so they've really welcomed it."

Find out just how far your ears can hear into the range of ultrasonic ringtones. Pretty much everyone should be able to hear the lowest tone (8kHz). Many people should be able to hear up to around 14.1kHz, from around 17kHz upwards we get into the range that only the under 20's can hear!

Take the test!