Wheel bearing noise can be caused by improper installation, driving through deep water, or driving on rough roads. Improper installation by an inexperienced mechanic can cause noise. Driving through deep water allows water to damage the lubricated bearings. Driving on rough roads puts pressure on the bearings and can damage them by impact, leading to noise over time. The document discusses these three main reasons for wheel bearing noise and recommends taking the car to a repair shop for inspection.