Wheel bearing noise

A drum rear axle bearing noise changes or goes away when the brakes are applied because the brakes support some of the load on the bearing. A bearing noise that comes and goes depending on turning left or right is pretty much always a front wheel bearing (and the outer bearing at that) because that bearing is the one that the load varies the most on during cornering. Quieter with brakes on is a rear bearing, and changes when corning is a front bearing.This almost always the case.
A rear bearing may become quieter under braking because the weight is being transferred to the front (not because of any change in the load path for supporting the weight). Can't fully agree on the diagnosis presented; I have had 2-3 rear wheel bearings noisier when cornering. But they also tend to be noisy to some degree running on the level.