Analysis of Mufflers and Ducts

The transfer matrix analysis of the transmission through walls as discussed in Chap. 3 is readily adaptable to the analysis of mufflersMufflers. This approach will enable us to construct models of mufflerMufflers and/or ductDucts systems having nearly arbitrary complexity. In the following, we will examine several key mufflerMufflers components using transfer matrices. A very common muffler construction is theExpansion muffler expansion mufflerMufflers, which consists of a section of a pipe or ductDucts that has an increased cross-sectional area. To develop a transfer matrix model of this we will use three transfer matrices, one for each of the junctions at the ends of the mufflerMufflers and one for the section between each junction.