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4. 8. 2014.
MODELLING OF CHAMBER MUFFLERS BY FOUR-POLE ELECTRICAL DUCTS
In this paper, we present a method for modelling of chamber mufflers by four–pole electrical ducts. The basic equations of the electrical ducts as the four–poles are first derived in the paper. Based on the electrical–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 loss (TL) is selected as a muffler characteristic. Some numerical results are given in the paper for various chamber diameters and lengths. Results are compared to those obtained with other methods.