What is the reason for the sudden loud noise in the Audi A6 as speed increases?

[AdrianLynn]

The reason for the sudden loud noise in the Audi A6 as speed increases is: wear of the sprocket bearing shaft head or transmission oil leakage and other faults. Applying soundproofing strips to doors and seams: For Audi A6 door frame soundproofing, you can use soundproofing cotton strips, soundproofing rubber strips, or soundproofing wool felt strips applied to the door frame seams to complete the door frame soundproofing. This can effectively suppress wind noise and some external noise. Installing trunk soundproofing: Applying soundproofing materials to the trunk of the Audi A6, as well as the wheel arch areas on both sides of the trunk, can effectively reduce tire noise, road noise, and exhaust noise. It will also significantly reduce low-frequency resonance noise caused by bass. Most of the tire and road noise during low-speed driving is suppressed, greatly improving the vehicle's stability. The feeling of rattling or falling apart when driving over uneven surfaces or potholes will disappear, and the vehicle's shock absorption and cushioning performance will also be noticeably improved.