Comment by justsomehnguy

Assumption: it's a USB one so it's not a good one in the first place and it shares the common ground with the the whole laptop.

And this is not the case of 'stronger than', it's 'strong enough to be caught up by anything resembling an antenna'.

You hear the interference because some analogue tract of your system:

Do transmit the radio waves everywhere

Does receive the inference from the all electric things around.

And now I'm skipping 'cuz I'm inna a bar and it's more interesting.