Most people can hear frequencies between 20Hz and 22Khz, though the frequency response drops with age. Here you can listen to some samples and see how well you can hear.
I can hear right up to the 22Khz frequency, although the guy that made these seems to have left in harmonics, so I can’t be sure I’m hearing the true 22Khz. In any case, the ‘teenager’ frequency is still clearly audible to me. Which, at 25yrs old, is a nice discovery. Of course, that proberbly also explains why I hear electronic noise from my PC (over headphones) that no-one else seems to complain about.