I read an article on sound in Discover
magazine where the author pointed out a site that lets you test your hearing. If you have pretty accurate speakers (not just computer speakers) or headphones and a decent audio interface, this can help you figure out your personal curve - frequencies that you hear better or worse than others. Here's mine:
This tells me that I probably don't really hear 16k, because even at that high level it's more painful to me than discernible. And for some reason, I hear 1k and 1.5k louder than the surrounding frequencies.
The audio system used will affect the results. If your system cannot produce 30Hz, then you will think you can't hear it even if yours ears are capable. I used Mackie HR824's and a Motu 896 (at 44.1kHz.)
Turn down your sound first, then head over and give it a try: