Compound Security Systems Ltd. of Britain has invented a new ring tone, which apparently can nor be heard by adults, because of its high frequency.
The ring tone is created using a frequency around 17 kilohertz – a range that is audible to relatively undamaged young ears but generally harder to hear for those older than 20.
So here is a new teen repellent – kids all over the world use this ring tone in class rooms, where mobile phone use is forbidden.
Here is a sample of the ring tone. Because of the lower sound quality for the MP3 file most people can hear the tone, therefore use the WAV version which is available here.
i heard some company is manufacturing devices to play the high pitch tone so park departments and the like can put them up to keep the kids away after hours, like at night. and whats with that fuck america song playing on every page of this site tonight?
link broken