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It is sounding more and more like a wheel bearing. They change sound with rpm changes or when the brake is applied or going threw corners. My last bad bearing remained snug when checking, but was noisy.
Half shafts get noisy too, usually the worn part has play or binds making a clicking sound,you have to physically check for binding or play. Jack it up put in gear and spin the tire, by the shaft if possible if not put it in neutral and spin the half shaft.
If corners and braking do not effect the sound then its probably not the bearings, if it doesn't happen during acceleration then its probably not the half shafts. Leaving sticky brakes.