A Study to Predict the Effects of Tyres Vibration to Sound Quality in Passenger Car Cabin

Vehicle acoustical comfort and vibration in passenger car cabin are the factors which attract thebuyers to a vehicle in order to have a comfortable driving environment. The amount of discomfortdepends on the magnitude, frequency, direction and also the duration of exposed vibration in thecabin. Generally the vibration is caused by two main sources, which are engine transmission andinteraction between tyres and the road surface. The comfort of the driving will affect the drivers byinfluencing their performance by bothering vision, and at the same time giving stress to the driverdue to generated noise. In this study an approach has been carried out to find the amount of noisewhich influenced by the vibration due to interaction between tyres and road surface. The soundquality study has focused on the estimation of the noise changes through the generated soundquality depending on engine speeds. From the results, the amount of sound quality followed theincrease and decrease of the engine speeds. Through the study, a technical method is provided toshow the correlation between generated noise sound quality and the exposed vibration caused bythe interaction between tyres and road surface.