I’m curious, how many people are aware of these sounds. I have designed, etched, and built my own switching power supplies along with winding my own transformers. I am aware of the source of the noise. So, does anyone else hear these high frequency sounds regularly?

  • Threeme2189
    1·
    11 months ago

    I think it has to do with the frequency they operate at (when dimmed?) . 50/60 Hz is obvious, but some with a higher frequency are still recognizable.

    Any time there is motion I get a strobe light effect. Either when looking at something that’s moving or moving my eyes to look at something. It’s like when you wave your hand in front of you when looking at an old CRT TV.