Sometimes you can feel if the wheel is warmer where the bearing is bad.
I once had such a noise and it was caused by a little stone that was catched in the top of the vented disc so it was hitting the caliper in tight turns...

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-94 E 36 AMG Coupé, Brilliant Silver
-98 G 500, Obsidian Black
-05 Mini Cooper, Solid Black
-97 993 Carrera S, Ocean Blue