Yeah. Usually if it's making a clunking noise, or some really weird grinding combined with squeaking sound when traveling over speed bumps, or just a general imperfection in the road, it will most likely be what the guys above outlined. Although, you only really notice it at slow speeds and the faster you go, you won't be able to hear it.
Get in there and see what it could be, if it's fixable... do it yourself or if you're not confident, just get a Mechanic to look at it.