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Do you often hear the ringing of switching power supplies and devices when you are in a quiet space?

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?

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  • I hear some of them. There's a real cheap one my parents got with a security camera thats real loud to me, but they don't hear it.

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