Reactive Muffler Analysis by Boundary Element Method & Experimental Method to Calculate Transmission Losses

For an automotive exhaust system the noise level, transmission loss & back pressure are the most important parameters for the driver & engine performance. In order to improve the design efficiency of muffler, resonating of the exhaust muffler should be avoided by its natural frequency. Mufflers are most important part of the engine system and it is commonly used in the exhaust system to minimize the sound transmission level which is caused by exhaust gases. The design of muffler becomes more and more important for noise reduction. The solid modeling of exhaust muffler is created by AUTO-CAD 2009 and analysis is carried out by using COMSOL Multiphysics 4.4 to study of muffler.