Duratracs do have a low pitched hum to them at that increases the faster you go, could be what you're hearing.
I'm hoping so, all my previous MT tires have been mounted on a truck that has huge holes in the exhaust, so I never paid much attention to the drone they produced. I found a set of '15 factory take off 17s with basically new Bridgestones mounted for $400 locally, I may pick them up to have a set of road trip tires. I'll see if the noise follows the tires.
Thanks for the help!