Erol H., Ahmetoglu Ö.

Exhaust noise of IC engines is the main component of noise pollution of the urban environment. To attenuate the exhaust noise, expansion chambers with different configuration has become an important area of research and development. The present study considers acoustic characteristics of circular fully-filled perforated dissipative mufflers with extended inlet/outlet. In addition to the finite element method (FEM), a practical investigation of experimental work is considered. Fiber material with different material properties and different radii are presented and discussed. Also perforation of the tubes differs in perforation ratios and lengths are discussed in this study. All parameters validated with experimental work with a practical designed muffler for obtaining the transmission loss. All graphical results are presented at the end.