Re: What can the noise be?
okay, sounds like a or both cv axles going/gone bad. the other thing you should really check is ball joints. if you don't fix the cv joint(s) you'll get stuck somewhere. i've also seen cv joints tear some stuff up pretty badly: even to the point where the car got 'catapulted'.
some other questions:
does the car make clicking noises when you are backing out of a parking spot or even going forward?
do you get a strange wobble when your steering wheel is turned all the way in one or the other direction?