Construction of sound insulation performance prediction method for exhaust system particulate filter using homogenization method

Abstract

In the automobile market in recent years, there is an increasing demand for automobiles that have less impact on the environment due to concerns about the impact on the environment. In addition, with the stricter regulations on outside noise, it is becoming more necessary to take some measures against noise from automobiles. In this study, we focused on the acoustic performance of the DPF/GPF as a sound insulation material. The validity of the model and calculation method is verified by carrying out the calculation results by the homogenization method and comparing them with the measured values.