I'm 33, I got a powerline plug that emits a high-pitched whine that drives me crazy. When I was in Tokyo, my friends and I would pass outside a shop at night that would have a supremely annoying whine that made me quickly walk away from it, but none of my friends could hear it.

I also frequently have to ask people to repeat themselves and can't hear what they're saying well in noisy environments. I think I have superhuman hearing loss.