A few years ago I went to the beach. The place I was staying at had a CRT television. I tried to use it once. I have no idea if something was wrong with it, but it was loud enough to cause pain. Once I turned it off, everything was quiet again and the pain was gone.
Some of the awful roars of noise I've heard while older people called me a weirdo. CRTs, early checkout scanners, some audio systems.
And back when "as seen on TV" electronic dog whistle trainers were all the rage? Torture.