Electrical noise on my non grounded laptop's microphone

DiogoVala

Commendable
Mar 17, 2016
1
0
1,510
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Hi all.
I live in an old house and the power outlets don't have ground.
The microphone presents a hum sound when the computer is connected to the power outlet, but it goes away when it's running on battery.
I have been researching a lot about this and found out you can fix this noise on your audio devices by using a "Hum Destroyer" (MICROHD HD400), but they only say it fixes ground loops. I am unsure that this is the problem I have, since I have no grounding whatsoever, but I'd like to know if something like this could fix my problem or if the only solution is rewiring the outlets.

Thanks all! :)
 

soundguruman

Distinguished


Disconnect Cable TV / Cable internet completely.
Did the HUM go away?
Use a Cable TV isolation transformer...isolate the entire house, where the cable enters.

Better Power Supply for the computer. Cheap power supplies are VERY noisy.
 

soundguruman

Distinguished


Disconnect Cable TV / Cable internet completely.
Did the HUM go away?
Use a Cable TV isolation transformer...isolate the entire house, where the cable enters.

Better Power Supply for the computer. Cheap power supplies are VERY noisy.
 
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