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Has anyone else noticed noise coming from USB ports at new AC Hotels in the US?

Question asked by rtoyen on Apr 4, 2019
Latest reply on Apr 5, 2019 by johnnyk60

I was at the AC Hotel San Francisco Airport/Oyster Point last fall and noticed that there was a buzzing/high pitched noise coming from the USB ports in the room.  I checked a few other rooms and this was the same in all of them.   I've read some reviews of other AC hotels on tripadvisor and it seems this is happening in other locations.  Has anyone else come across this?