Internal combustion automobiles produce a variety of noises, the loudest of which is the exhaust pipe noise. It is necessary to find out the contribution to sound attenuation of different silencing elements of the whole exhaust system and then to process and/or refine them using simulation tools to check the sound level and its drop through the whole system. An overview of the overall theoretical basis of exhaust components and their operation is followed by a physical test using measurement tools, then an overview of the currently installed system components and a presentation of possible upgrades and their implementation in simulations. Using computer aided tools, we compare results of the conversions with the current exhaust system and show the comparison betweeen simulated and physically measured noise levels to determine the validity of such simulations and possible further use in exhaust development.
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