I'm a teenager!

Or at least I have the hearing of someone under 20.

Are you young too? Play this noise. If you can hear it, you've got young hearing.

Apparently teenagers are using it as a ringtone. The teachers (supposedly) can't hear it.

I'm tempted to use it - it would be great in meetings at work. If anyone can hear it I can congratulate them on their hearing and they won't mind my phone interrupting the meeting. (I wish)