Basically you would rock the car back and forth and from the weight of the car transferring onto that side, it would put more of a load on that bearing so it would make more noise. Re-torquing the axle nut at this point wouldn't make the noise go away. Damage would be done if that was the problem. This might seem like a lot of work, but could try swapping the left and right side bearings and see if the noise appears on the left side instead of the right.