Publication

Abstract : India, being the fastest growing economy, has an ever increasing demand for transportation leading to increased competition between the manufacturers. Boundaries of the various parameters were pushed for saving time to market and cost. Among these parameters, the in-cabin noise level plays a major role in defining the comfort of the passengers. This article assesses the in-cabin noise levels of one of the entry level vehicles from a manufacturer. The whole study was conducted in two parts. The first part involving overall measurement of the noise levels in the vehicle and the second part is to study the major noise transfer mechanism. An acceleration test was first conducted to study the overall noise level. Various test conditions are designed to predict the major contributor of the in-cabin noise as part of the second step. The major contributing factors are engine noise and road and tyre interaction noise. Tests were repeated to eliminate the road noise. Noise levels measured in the cabin show that the airborne noise is the major contributor.