On the link bellow there's  a list of tones that go from 8,000Hz all the way up to 22,000Hz. It’s fairly common for people who are over 25 years of age to not be able to hear above 15Hz, so this will help you find out where your high frequency hearing cuts off.

Musicians have a much higher risk of hearing loss that most people do, and many of us don’t really wear proper hearing protection. Even just listening to an ipod for an extended period of time can permanently damage your hearing. We also gradually lose our high-frequency hearing as we age.
http://www.noiseaddicts.com/2009/03/can-you-hear-this-hearing-test/

I can hear all of them. Not sure if it's because I took the test with headphones. 21kHz and 22kHz were very weak though.

I couldnt hear the last one

I can "hear" them all, however, 19-22 I can only hear turn on and off, I can tell [feel?] the change but I cant hear it playing, interesting

*had to listen to music immediately after to soothe my ears tho, lol*

lol mine cuts out at 18khz. =S haha.

Did anybody listen to all of them? Or did you all start from the last one?

Cz I started with 8 kHz and was shocked I couldn't hear the 14 kHz anymore
But then I found out I actually could hear the 15 kHz
So I listened to all of them and it seemed I couldn't hear 14, 16, 18, 20 and 22, but I did hear 15, 17, 19 and 21

Something wrong with the sounds maybe?

sounds are fine went thru all, and they all work, the last couple hurt my ears though, maybe thats bad, lol

interesting you couldnt hear the evens, lol

lol, that's really odd

As I said, I heard all of them on my headphones. Haven't tried on speakers.

I've only tried it with speakers. Maybe they don't work very good haha

19 kHz for me.

I guess mom was right about full blast music.

According to the ZUNE manual, it only takes 15 minutes of exposure to loud music to permanately damage your hearing.

20kHz for me and my wife.  Not to bad for us being a few months away from 30. 

Wearing that hearing protection helped over the years.

20kHz for me! Love this, going to send it to a few friends, young and old!