An acoustic target setting and cascading method for vehicle trim part design
The first concern in the vehicle trim part design may be its acoustic targets, which are generally defined by absorption area or coefficients, transmission loss (STL) or insertion loss (SIL). The acoustic target break down or cascading in vehicle design is referred to as the process to decide the trim part acoustic targets so as to guaranty the whole vehicle acoustic performance. In many cases, these targets are decided by experience or even subjective evaluation. Simulation based transfer path analysis (TPA), which trace the energy flow from source, through a set of paths, to a given receiver, provides another solution of this problem. Inspired by TPA, this paper proposes a component level target setting method based on the statistical energy analysis (SEA), which is recognized as an efficient method for vehicle NVH analysis in mid and high frequencies.