My wife's car has a low tone noise/vibration from somewhere in the front, that gets louder the faster we go, and seems to be related to wheel speed, not engine rpm. Car seems to run fine otherwise. I have done regular maintenance including transmission fluid replacement. Replaced all tires last week (with good Michelines). Replaced front brake pads and rotors today. Noise persists.

I'd think if it was related to engine, e.g. hole in exhaust header, it would change with rpm.

The tone isn't a warble type, like you might expect from a bad tire. It just gets louder the faster we roll. The vibration seems merely to be a product of the noise, as the car is otherwise smooth.

 

Might be a wheel bearing.

 

I have the same issue with my 13 Sport manual. I've changed brakes and rotors. Mine seems to be coming from the front left side

 

Check the intermediate drive shaft ( passenger side) that has a bearing in the support bracket. I replaced mine and fixed it. If it looks like oil is around it that is the grease gets so hot it looks like oil. Socket and hammer and seal. Drain transmission otherwise it comes out when you pull the axle. Bad news is outer shaft has to come out to get to the inner shaft.