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Do you often hear the ringing of switching power supplies and devices when you are in a quiet space? (lemmy.world)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

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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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[–] [email protected] 32 points 8 months ago (4 children)

My father used to make fun of me for saying that I could hear the TV on even if it was muted, or that I could hear the furnace 'scream' before it came on.

One year, I got as a gift for Christmas, a handheld recorder and a fancy microphone from my stepfather a university music professor And that recorder could actually record the sound which he was able to show me on the computer.

That was like 25 years ago, I've been working with computers ever since, and now I am familiar with many many many devices that make high pitch whines.

[–] [email protected] 10 points 8 months ago (2 children)

The TV thing, from what I've gathered, is normal in kids and lasts up until your 30s or somewhere around there. After that your ears just can't pick up that pitch anymore.

[–] [email protected] 7 points 8 months ago

CRT TV's stopped being common at the same time I was aging into the range that would be unable to hear their distinctive whine.

[–] [email protected] 3 points 8 months ago

I'm 40s and can pick it up sometimes. Depends on the TV.

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