I, myself can hear up to just shy of 16,000 Hz (approximately 15,875 Hz) and I'm 21 so that seems right. When posting, remember to put down your age and the frequency. That's all.
EDIT: Took another test, made a mistake. I can apparently hear up to around 17,000 Hz upon further listening, it's just a bit faint.
EDIT 2: I'm testing tone generators and I'm not sure if the ones I took before were accurate- perhaps the tones were compressed? (took the prior tests on YouTube since the downloads seemed to be full of bloatware) For some reason anyway, I used this website (http://onlinetonegenerator.com) and I can hear around 17,700 Hz at low volumes but after that I can only really hear it begin and stop.
Edited by Garraty - 7/1/14 at 8:16pm