Teen Buzz used by pupils to circumvent mobile phone ban at school

metro.co.uk reports:

A high-pitched alarm which cannot be heard by adults has been hijacked by schoolchildren to create ringtones so they can get away with using phones in class.

Techno-savvy pupils have adapted the Mosquito alarm, used to drive teenage gangs away from shopping centres.

The alarm, which has been praised by police, is highly effective because its ultra-high sound can be heard only by youths but not by most people over 20.

Well, apparently adults can hear it from 1m away, but not if further away.

Anyone has a copy of the file?

Written by pinolobu on May 26th, 2006 with no comments.
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