as far as i know, the noise isnt normal... i dont have any to be honest. and the camera system is very delicate... i think dropping it can affect the camera, and of course, everything
Actually, the noise is normal, though I haven't heard it in any recordings (the videos I take usually have a fair amount of ambient sound). My 1020 even came with a card with the following...
Nokia Lumia comes with some incredible technology that you can actually hear.
The amazing PureView camera inside your phone is delicately cushioned with
suspended optics that are literally rolling on tiny ball bearings.
So if you hear something moving around inside your Lumia 1020, don't worry.
That's the sound of blur-free photos and super-stable videos.
(text autodetected through SkyDrive)