A simple test for wheel bearing failure:
1. Jack front of vehicle up so both wheels are off te ground
2. Start at drivers side and put one hand on the coil spring. With the other spin the wheel FORWARD.
3. Use your hand on the spring to feel for vibration while making sure not to touch the wheel while spinning so it doesn't cause a false vibration. - might be easier to put the car in neutral.
4. Do the same to the passenger side. Whichever one has the noticeable rumbling is the bad one.
That text comes from this thread I had 6 years ago when I had a failure with noise kinda like yours:
http://ecomodder.com/forum/showthrea...tml#post362834