Ever notice that when a TV is turned on you can hear a shrill sort of buzzing sound? No? Well, then you’re probably too old. According to this site the range at which we can hear shrinks as we age. They put up two sound clips, one of them you shouldn’t be able to hear if you’re older. They also posted clips of sounds at different Hz. I can hear up to 19,000 Hz and can barely make out 20,000. What about you guys?