Theoretical analysis of tire acoustic cavity noise and proposal of improvement technique

Abstract This paper describes an investigation into interior road noise caused by the acoustic cavity resonance inside the tire–wheel assembly when a passenger car is running. First of all, we researched some characteristics of the acoustic cavity resonance inside the tire–wheel assembly. Next, we derived the equation of motion of the acoustic cavity system and explained the characters theoretically. Then, we proposed a technique to reduce the peak level of the acoustic cavity natural frequency. Finally, we made prototype wheels and confirmed their validity.