Gaa, I have a headache now.
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
21.1kHzTake the mosquito ringtones hearing test I'm always the one hearing computer monitors or television sets with the mute on, and this confirms it. Fluorescent lights do the same thing, only to a lesser extent--they must have some type of sound that they project, and it's probably on an extremely high frequency if it has a lesser effect. It gets wicked annoying after a while though.
Yikes. After listening to ringing like that for a period of time, I start seeing what I am now... that is electric blue futuristic spots in front of my closed eyes. Oy. Synaesthesia+a blind person's hearing=a very interesting blending of sight, sound and general perception.
Great, now my senses are all screwy. It'll resolve in a bit, but until it does, I'm seeing and hearing future blue.