How to judge whether there is noise in SKF Bearing in wheel

When one of the SKF bearings of the four wheels of the vehicle is damaged, you will hear a continuous buzzing - buzzing - buzzing sound in the vehicle while the vehicle is driving. I even feel that the whole car is full of this sound, and the faster the speed is, the louder the sound is. Generally, a slight buzzing sound can be heard at the speed of about 60km / h. It is obvious at the speed of 70 and 80km / h. When talking in the car at 100km / h, you should raise your voice. At this time, there is a fine vibration feeling on the soles of your feet.
I believe the above situation is not strange to friends with cars, but where does this sound come from?
The above noise comes from SKF bearings in the wheels of the car. If * * really don't know what's going on when you meet it for the first time. So, how to judge whether it is the noise from SKF bearings in the wheel?
When you hear this buzzing noise during driving, don't panic. You must keep calm and continue driving. Generally, the following methods can be used to judge the sound source of noise:
The simplest way is to open the window and listen to whether the sound comes from outside the car;
After increasing the speed (when the buzzing sound is loud), put the gear in neutral and let the vehicle slide, and observe whether the noise comes from the engine. If the buzzing sound does not change when sliding in neutral, it may be the problem of wheel SKF Bearing;
Get off the vehicle and check whether the temperature of the axle is normal. The method is as follows: touch the four wheel hubs with your hand to roughly feel whether their temperatures are consistent (when the clearance between brake shoes and pads is normal, there is a difference in the temperature between the front and rear wheels, and the front wheel should be higher). If you feel that the difference is small, you can continue to drive slowly to the maintenance station;
Lift the car with an elevator (release the handbrake and put it in neutral before), or lift the wheels one by one with a jack and rotate the four wheels quickly respectively. When encountering a faulty axle, it will make a sound, which is completely different from other axles. It is easy to distinguish which axle has the problem with this method. When there are accessories, the fault can be eliminated by replacing them directly.