Why do devices buzz when plugged in?
When connecting devices (to any outlet) such as: a lamp, charging from the phone, a system unit, sound equipment, etc., these devices emit extraneous noise similar to a luminous microphone. We live in a private house, there is grounding. The wiring is new. Devices are serviceable, checked in another location.
Hello! Check the voltage in the network, if it is low, then the devices may hum.