A couple weeks ago a very strange sound started coming from the passenger side, I have not been able to isolate it, not from lack of trying. It starts up about 1 minute after starting the car and is fairly loud, to me it sounds like an electric shaver or similar buzzing sound. If I open my driver door it immediatly stops, but starts again if I shut the door...same with the passenger door, open it and it stops, close it and it starts! I have tried to climb over the console with my head low to the seat but my body wont let me! My wife sat there while we opened and closed the doors and she could not isolate it...but definitely not coming from the door speaker. What could this possibly be?? Also it will go away when the revs go up a bit from idle. Just very weird as I am convinced it must be electronic in nature due to the doors syncing together??? At a loss here....