According to the Ultra Sonic ring tones site, I’ve got the hearing of 20 year old. That’s pretty amazing to me since I’ve long passed 20 and when I was in my late teens I played bass in a rock band. I just knew I wouldn’t be able to hear very far up the scale.
I could barely make out 17.7kHz, but not well enough I could be doing something else and hear it. So, take the test and see how well you hear.