Does anyone know if there are any tweaks or settings that could be causing this? I looked in the FAQ, and I only see a giant thread about static while at low volumes, but this looks to be a completely separate problem since it's unrelated to volume settings & it happens when I have no sound playing at all. Googling this returns a bunch of results with people's chargers making noises, but not the Nexus 7 itself.
If anyone else has had this problem and can offer any insight, that'd be appreciated. It's not the biggest deal in the world, since I just have to make sure I'm not in the same room when it's charging so I don't get annoyed, but if I can fix it, that'd be great.