Brake noise
 

I just replaced my rotors and brakes yesterday. I went to the store today and was having no problems but out of nowhere when I was leaving the store I started hearing some weird metal noise like if something is loose. I used the same brake hardware kit. I went over speed bumps and didn't hear anything. It only makes the noise when I go over small and uneven holes or small cracks on road. What could it be? Thanks for your help.

Many variables with your install. Calipers, piston, boot, shim tracks and related all cleaned up. Bolts torqued evenly to proper spec. The springs installed... The shims are not recommended to be re-used though enough do. I replace with new for each brake pad replacement. Were the caliper guide pins replaced - or cleaned greased too? Go back and recheck.