Why do some AC adapters and power supplies generate a whining noise, and what can I do about it?

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Track title: CC H Dvoks String Quartet No 12 Ame

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Chapters
00:00 Question
00:58 Accepted answer (Score 102)
04:01 Answer 2 (Score 17)
05:41 Answer 3 (Score 8)
06:05 Answer 4 (Score 7)
06:50 Thank you

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Full question
https://superuser.com/questions/832480/w...

Accepted answer links:
[switched-mode power supplies]: https://en.wikipedia.org/wiki/Switched-m...
[PWM]: https://en.wikipedia.org/wiki/Pulse-widt...
[inverter stage]: https://en.wikipedia.org/wiki/Switched-m...
[subharmonic]: https://en.wikipedia.org/wiki/Subharmoni...
[this Wikipedia article]: https://en.wikipedia.org/wiki/Coil_noise

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Tags
#powersupply #noise #charger #communityfaqproposed

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