Possible brake noises are not generated by the brake disc itself! The "culprit" that causes such resonant noise is other components of the brake system that act directly or indirectly on the brake disc. The brake lining shall be the first component that generates brake noise. When the brake lining fails to match the brake disc optimally due to its composition, or when its assembly process does not completely meet the requirements of the brake disc, it will cause brake noise. Another cause of brake noise is foreign matter embedded between the brake disc and the brake lining.