Noise inside the console

Firstable I though was the cassete tape from the radio, I turned it off, but the sund comes from the passenger side inside the console, close to the air bag, sound like loose cable hitting inside, the radio, AC, speedometer, are ok. I do not live in the forest with windows open, I always close my window, park my car in my space, and lock. This morning I started no noise, but when I hit the gravel on the streets (working on the pavement) start the noise again then goes away in about 2 minutes or so. I am puzzle?

Today this afternoon 10/12/11 I open the passenger side look under the glove compartment put my hand over a black plastic tube. Then I felt it the kicking noise, but I do not have the AC or the heater ON? When I start the car, then a couple of minutes the sound goes away. Is there a motor? Or fan? To me sounds like a cable hitting that plastic.