Whats is this noise from my blazer?

Hey, so my blazer has had this noise for a while now its like a clunking noise when i drive and i hear it more when hit a bump. It sounds like something is loose.. I had my ball joints replaced not too long ago because they were worn out, and i thought that could have been the problem but the noise came back. I usually only notice it at slower speeds, and when i press on the brake it stops the noise instantly. Any ideas as to what to look for