How to Solve Audio Ground Loop Hum

By Xah Lee. Date: . Last updated: .

Got a problem with ground loop hum when i do YouTube video, when i moved into a new place. That is, your speaker or mic creates this buzzing or humming sound, even if there's no input.

If you have hum from your mic or speaker, try the following steps, in order:

  1. Plug in your devices: computer, display, microphone, speaker, etc all in the same electric outlet. (using a surge surpressor. surge surpressor )
  2. Place audio wires away from electric wires.
  3. If you have a 2 prone outlet, try plug laptop into a 3 prone outlet adapter, or vice versa. (3 prones is safer, but prone to create ground loop hum. There is no 3-prone to 2-prones adapter.)
  4. Sometimes the problem is due to cheap headphone or headset or speakers themselves. Logitech H390 Headset has this problem. Buy a better one. [see Buying Headset] [see USB Speakers] [see Buying Microphone]
  5. Buy a snap on Ferrite bead. It removes magnetic inteference. Ferrite bead [see Ugly Blob in Computer Cable]

Following is some of my research notes, with help from Jason Cunliffe [2021-04-16 ] and r34p3r.

How to Solve Ground Loop Hum

Solving Laptop Noise and Ground Loop Audio Interference
Mar 28, 2012
6 simple and cheap ways to fix hum, buzz and ground loop noise
Oct 15, 2018
Klein Tools RT500 Receptacle Tester fvm7r
Klein Tools RT500 Receptacle Tester Buy at amazon

Headphone, Headset, Microphone

Xah Keyboard Guide