http://www.jimmyr.com/blog/hearingloss.html Darn it. My old age getting to me. Couldn't hear 16000Hz.
Pfft, my hearing is terrible. Too much loud music. Can hear up to the 14000Hz without headphones, with headphones can hear up to 15000Hz. I cannot hear any of the low frequency ones without headphones and with I could only hear the 50Hz one.
Heard all of them, I'm 14, and I listen to rock cranked all the way up, and I have good eyesight... But already have a bad back, its heridatry.
Can't hear 19000, but that's probably because I went to bamboozle yesterday and my ears are still buzzing.
I couldnt hear the 17000 18000 and 19000 but I could hear the 20000 21000 and 22000 and all of the others no problem I didnt try to listen with headphones on though and my comp speakers are lame...
I must be a robot: I can hear all of them, even the 15 Hz one... One of the problem I see is that some el-cheapo speakers and headphone won't produce the sound at all so there's nothing to ear
Perhaps it's your speakers? http://www.youtube.com/watch?v=4G60hM1W_mk Try this, it progressively goes from low to high. See what you get then.