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?

  • Lightfire228
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    9 months ago

    Use a spectroscopic app on your phone

    It’ll help you identify the source of high pitch sounds

    I once noticed an external HDD was making a high pitch noise intermittently, as the LED turned on and off. It was bizarre

    Edit: spalling