MODELING OF CHAMBER MUFFLERS BY 4-POLE ELECTRICAL DUCTS

In this paper, we present a method for modelling of chamber mufflers b y four-pole electrical ducts. The basic equations of the electrical du cts as the four-poles are first derived in the paper. Based on the ele ctrical-acoustic analogy, the muffler elements are represented by four -pole electrical ducts. The acoustic pressure is analogous to voltage, while the volumetric velocity corresponds to current. Transmission lo ss (TL) is selected as a muffler characteristic. Some numerical result s are given in the paper for various chamber diameters and lengths. Re sults are compared to those obtained with other methods.