2004 Saturn L300 Noise on right side of the tire/wheel well

For the past few months my car has an echoey noise that has been getting louder. Not sure what it might be. My husband says it might be a bad shock. Whenever I'm on a real bumpy street I hear the noise even more. It sounds like I'm going over rail road tracks.

I have extended warranty on my car not sure if this would be considered normal wear and tear or would this be some type of manufacturer defect.
Thanks