4 ms·
That's only for TVs, though. Computer monitors had higher refresh rates and were not audible.
by ygra 4y ago
That's only for TVs, though. Computer monitors had higher refresh rates and were not audible.
- jefftk 4y agoI could hear them. They can't have been that high.
- vikingerik 4y agoWhat you hear is the horizontal refresh rate, scanlines per second. For NTSC television and CGA video, that's 15.7 KHz and within the audible range of quite a few humans. 640x480x60fps noninterlaced VGA is twice that at 31.4 KHz, which mostly isn't audible although a very few exceptional cases might. Higher resolutions are higher still, of course. That said, as with anything involving analog frequencies, there might be harmonics or resonances that could be in a range you can hear.
- jefftk 4y agoI could definitely hear CRT monitors at resolutions well above 640x480, so it can't have been the horizontal refresh rate.
- Eupraxias 4y agoI remember that I always noticed the sound when someone turned on a TV or CRT in my house when I was growing up. I miss that.
- Symbiote 4y agoThat depends on the age of the computer monitor. Older ones could whine.