When I was really young (about 5 to 8 years old) I was able to hear an ulta sound remote control from some whacky 70's or 80's tv. These days I have tinnitus so I'm still able to hear high pitched sounds. I think I have some "dead" bands of hearing but some of the high pitch stuff is still working. High pitched sound is also really really directional. I some times need to turn my ears to face the sound in the right direction to hear it clearly and even then it's more like a sound "in my mind" than a sound that I know is really there. It's quite strange.