Ring-a-ding-ding?
Wow. recharge linked me to this really interesting Article.
A condition called presbycusis, or ageing ear, means that by the time most people reach the age of 25, they cannot hear much above a frequency of 13 or 14 kilohertz.
Wow. I didn't know that wtf. Anyhow, I then proceeded to this link to hear a variety of them and see up to how much I was able to hear. (I'm 19. D:) And damnit my ears are ringing like betches.
If you're over 20, the ringtones in the 17 to 21 kHz range will most likely to be inaudible to your ears.
True. I only heard the 8kHz to 17.7kHz -- BUT WAIT, I'M NOT OVER 20, FOOL. WHAT IS THIS JACKASSERY YOU LIE OF?
Anyway, you guys should try it out!