for us oldies and OG!!

download this onto your mobile and drive your kids crazy with the tone that we can't hear, but they can.

Got my lad to lock himself in his bedroom as the noise permeated upstairs MWWHAHA!!

MotoGP on the telly? play the tone continuously and you got the tv to yourself!!! sorted

aparently anyone under 20 can hear it, and some kids use it as a text tone so the teachers can't hear the text message comming in!!

http://www.archive.org/details/15kHz_tone

Fuck me...... I must be under 20!!!!!!

I actually just have sensitive hearing and yes, it DOES hurt!!!!!!!!!!

Bugger, ...The kids refused point blank to dowload it for me.

I think Motorhead in the 80's did my hearing in

Fuck me...... I must be under 20!!!!!!

I actually just have sensitive hearing and yes, it DOES hurt!!!!!!!!!!

You can hear it because its not a pure sine wave.

Your average 40-49 year old can hear 15 kHz just fine, however the cutoff frequency for a young person can be high as 20 kHz or even 25 kHz, for a pure sine wave and for your average 40-49 year old 15 kHz - so technically they are right - but these ring tones are not pure sine waves so on the other hand its wrong. They are just annoying after a while.