could you describe the ruckus? (sorry had to)
could be a multitude of things - likely hub/brake/wheel/tire/axle related... anything from minor-dont-worry-about-it to omg-you're-going-to-die-if-you-drive-the-car
Describe the sound a little closer and it could help us. Also jack up that corner and inspect things like turn the wheel by hand and see if it feels smooth and quiet, see if there is play in any direction, etc - tell us the results of that too
