Ringtone that only kids can hear

Yeah I can't hear it and I'm 17. I think it might be from the iPod earbuds being on too loud for long amounts of time... I've heard that hinders your hearing.

 

Yeah i'm 16 and I couldn't hear it. Whatever.

 

My math functions teacher told our class bout this like 2 weeks ago randomly. Kinda weird. I just keep my phone on vibrate, it's simple.

 

I'm 18 and can hear it. Guess I'm not mature enough or something.

 

18 and can't hear it.

 

My friend is 18 too and he can hear it real loud, as well as my sister. Crazy stuff.

 

im 15, and i didnt hear a thing