High Sensitivity to sounds

On the topic of high sensitivity to sounds, my son was recently telling me about something I had never previously heard of, called Coil Whine. He had never heard of it either, until he happened to mention to someone that he is aware of a high-pitched whining sound when he is in the vicinity of rechargeable gadgets that have been fully charged.

On the topic of high sensitivity to sounds, my son was recently telling me about something I had never previously heard of, called Coil Whine. He had never heard of it either, until he happened to mention to someone that he is aware of a high-pitched whining sound when he is in the vicinity of rechargeable gadgets that have been fully charged.

I used to find lots of electronics squealed. TVs annoyed me the most. The tone can change depending on what it's doing.

Cheap power supplies do it.

Is it a plug in usb charger, or a wireless charging pad? Or both?

I thought it had got better but perhaps it's just I am getting older and don't hear as well any more.

Sporadic Sparkly said:

my son was recently telling me about something I had never previously heard of, called Coil Whine.

There is an article here about the issue and a number of ways to resolve it.

https://clevercreations.org/what-is-coil-whine-how-to-fix/ 

I hadn't heard of this before - an interesting issue.