Try riding the brake pedal slightly while hitting a small bump.

If the noise disappears when the brakes are applied, then it probably needs a hardware kit for the front brake pads. Kit costs about 10 bucks at rock auto.

It might not be the answer, but I've seen one do it at 65k miles so maybe that'll help. The metal loses it's 'spring' qualities after a bunch of hot/cold and being beat up over time