If you turn right, your car leans over and puts a load on the left side... yeah? Well, if that wheel gets quiet... it's the bad bearing. Alternatively, if load is taken off a wheel (inside wheel... think of a car picking up a wheel in a turn, this is just a more extreme example of the load removal) and the noise increases, this is also a bad bearing.
Keeping that in mind, drive around and see which wheel quiets down when you load it up... you've found your culprit.