Do you often hear the ringing of switching power supplies and devices when you are in a quiet space?
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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Yes. I can hear to about 18kHz, so cheap USB chargers are no longer allowed in my house....
Worse, the EV chargers I used to work with had PEMs switching at 10kHz for the US UL variants. EVERYONE could hear those!!
Test your hearing range with this if you want...
https://www.szynalski.com/tone-generator/
I used the 10kHz tone to annoy the eng dept in the office till they changed the PEM switching freq to 20kHz....
I'm sorry but you're not generating true 10 Hz tones with speakers that are unable to reproduce such sound
Hell most premium speakers go down to 15-20 Hz at best
They said 10 khz not 10 hz
Whoops
Only two orders of magnitude, can you really blame them?
Isn’t it 3? 10 -> 100 -> 1.000 -> 10.000
yeah u right