R u too much into ipod? or aging?

Got this from a colleague.

"Most humans are born with the ability to hear frequencies from about 20 Hz (low) up to 20,000 Hz (high) but that range shrinks as we get older. A guy in England figured that meant kids can hear things adults can't - specifically, very high frequencies. .."

Check it out here

[Rated:PG] Dun crank up your speaker...