[LoganDark]

15.625KHz to be exact. I can hear this sound quite well, to the point where I prefer not to be in the same building as any CRT that emits it.

There are those that don't, mainly newer models I assume. I think it has to do with the exact shape of the waveform that drives the (horizontal part of the) deflection yoke. Some of them are noisier than others.

[jeffparsons]

Same. As a child, I could be reading a book at one end of the house and I would experience discomfort (experienced as a slightly painful "pressure" in my ears) when the television, which was 4 rooms away, was powered on. My family didn't believe that I could tell, because to them it was silent. So they challenged me to a double blind test, and were surprised to find that yes, it really was the TV that was bothering me.

Related, we did a hearing range test in a high school science class. I could detect the tone generator at a frequency well beyond what anyone else in my class could pick up. I couldn't hear it as a sound anymore after a certain point, but could still feel it as an uncomfortable "pressure" inside my ears.

[idonotknowwhy]

It's the PAL and NTSC (480i / 240p) sets we can hear. VGA (480p and higher) screens scan at > 30khz so we can't hear them.

I like the sound and can hear when a shop has a CRT security camera when I walk past lol

[therein]

I remember enjoying that sound as a child. Muting the TV while falling asleep.

[LoganDark]

One of the power supplies I own makes a high-pitched whining sound from its fan. It's the most terrible, obnoxious sound, but I somehow don't mind it. It blends into the background after living in it for years. Still, when it goes away, there is nearly unparalleled silence.

[drmpeg]

The exact formula is 4,500,000 / 286 = 15734.265734265... Hz.

[pezezin]

That is for NTSC, for PAL the formula is 625*25 = 15625 Hz