13' Sonata Brake Noise
 

It just started happening last week and has been getting louder/more common after 15-20 minutes of driving.

Took it to the dealership and this is what they diagnosed:

"Owner states there is a noise when braking. It slows when the tire rotation slows. Checked for concern, Road tested and heard brake noise when slowing. Brakes are working as designed. Will get more noises when pads and rotors are rusty from dampness and rain"

I'm not buying this B.S.! The noise is extremely loud. Gets louder as the brakes heat up from driving. This is not your typical squeaky brakes. THis is a thump..thump..thump noise that occurs at the same time in during the wheel rotation while the brakes are being pressed.

Any advise?