Could it be related to this Service Bulletin?
http://www.urvi.net/forumfiles/SB/A08-088.PDF
There is also the following Service Bulletin for older models...I don't know if the fix is the same for a 2010. I have an 06 EX-L with poor AM reception plus static when going over bumps or striking the dashboard, exactly as noted in the pdf below. It's an issue with my AM only, not FM, and it gets much, much worse as the weather gets colder. Once the van warms up, the symptoms almost completely disappear. It's almost bearable for the few minutes that it happens during the summer but now that I'm into my first winter with the van, I've found I can't even listen to AM in below-freezing temperatures for almost a half hour.
http://www.urvi.net/forumfiles/SB/A08-088.PDF
Luckily I've added an AUX jack and Bluetooth so I can listen to just about any station through Tune-In Radio over my smartphone.
