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?
How many concerts to I need to visit to fix this issue?
Even half an hour next to the PA without special ear plugs is enough to permanently harm your hearing.
That’s easy - so this is the solution OP is looking for