Author(s)

G. Rosenhouse and O. Findling

Abstract

The paper investigates the transmission loss and the sound fields within acoustic mufflers. The analysis is based on two kinds of calculations, namely: 1. One-dimensional analysis. 2. Two-dimensional analysis, by FEM. The results of the analysis are compared when possible with results presented in other publications. While the one-dimensional theory enables closed form solutions, and investigation of the physical meaning by analyzing the algebraic solutions, it does not involve lateral effects. Hence, the limits of the one-dimensional theory are defined by comparing the response functions, including the transmission loss and using visualization of the internal sound field within the muffler, which exhibits the lateral effect's dependence on frequencies in the two- and the three-dimensional models. In this

Keywords