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?
Curious. I thought that buzzing from cellphones was TDMA induced, which isn’t really a thing since… LTE, I think? I’m wondering why you still get this. Older phone, older network/infra…?
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Interesting! I haven’t had this happen with any speaker or amp in a good decade. I wonder what it is!