I have this sound coming from the front of the car. Sounds like it's on the passenger side. It sounds like a propellar on an airplane and it will only make the sound around 30 MPH and up. I have replaced the passenger side wheel bearing and the cv axle on that side thinking it might have been the center bearing but the noise hasn't gone away. Anyone ever have the idler pully/belt tensioner pully go bad and make the kind of noise I described? I've checked all the other wheel bearings and they seem fine. Not sure what else to check.