I remember one time, when I worked for my father, who, designs and manufacturers radio broadcast
equipment - he was testing out a unit, two floors DOWN from where I was, and this super annoying
noise was going on in my ears. I thought it was one of those pressure things going on but it would just
NOT STOP.
I ran down stairs and said "could you knock off the damn annoying high pitched noise already, PLEASE?!?!?"
And my father said "Jesus, honey, only dogs and dolphins should be able to hear that!"