ACOUSTIC SCATTERING FROM 2 JUNCTIONS IN A RECTANGULAR WAVE-GUIDE

Acoustic scattering from two junctions in a rectangular waveguide is s tudied. Fourier transform and mode matching are used to represent the scattered wave and the simultaneous equations for the modal coefficien ts are formulated. The residue calculus is utilized to obtain a soluti on to the simultaneous equations in fast-converging series. Numerical evaluation shows the behaviors of transmission and reflection in terms of the junction geometry and operating frequency. (C) 1998 Acoustical Society of America. [S0001-4966(98)00802-9].