Sounds like it could be a warped rotor, if you can see through the wheels then check to see if there are spots on the rotor that look different. I don't have the words to explain but you should be able to see it with your eyes if they are warped very bad.
I definitely think a warped rotor is the cause of the noise at the OP's house. That, or the ubiquitous muffler bearings.
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