I have freakish hearing!

You are a dog

Or maybe you are a mosquito, you certainly can't be human. The highest pitched ultrasonic mosquito ringtone that I can hear is 21.1kHz

Find out which ringtones you can hear!

To be honest, I could only hear the 17.7-21.1 kHz sounds by switching to the desktop computer and putting my ear to the speaker (I can hear the 16.7 on desktop only, and lower ones on the laptop). I blame the Aspergers.