[gambiting]

My problem with literally every wireless charger I ever used is awful coil whine or ticking noise, really disturbing if you have the charger next to your bed. I've tried official Apple one, Samsung one, Anker, Auckley, few other random chinese brands, and they are all so loud when charging(Samsung's is probably the worst for it, as it has a fan inside - yes it charges my S23 pretty quickly but I wouldn't use it anywhere other than a loud office environment). I don't know if this is a problem of insulation or is it just inevitable given the technology used.

[ComputerGuru]

I’m very sensitive to coil whine (and have documented hyperacusis for high-pitched noises) but I’ve had no issues with the Belkin wireless fast charger; BUT if you’ve had this issue with all the different makes and models perhaps it is the coil in the phone and not the one in the charger that is faulty? There’s a coil in each.

[mystik21]

Interesting...I've used my Apple MagSafe charger since its release with the iPhone 12 and I have never once noticed a whine or ticking from it. AFAIK, I do not have exceptional hearing loss from age and I am able to hear all but the highest of frequencies in the audible spectrum. Would you call it particularly high pitched?

[gambiting]

Yeah.....like a very high pitched whine. At low battery level it's pretty much steady, then as it gets close to 100% the charger clearly provides power in pulses as it goes on and off with longer and longer gaps.