An analytical solution for a rectangular piston independently driven at two edges

Abstract

Far-field radiation of a baffled rectangular piston is described using a frequency-domain Rayleigh integral solution. The piston model is driven at a single frequency at two opposing edges, where these individual edge sources are independent of one another in both amplitude and phase. Directivity plots of the analytical solution are used to graphically observe directional effects caused by changing the phase and amplitude of these edge sources. Interesting and unexpected beamforming characteristics are shown to be produced by certain amplitude and phase combinations. [Work supported by IBM through the Shared University Research program and the Applied Research Laboratory at Penn State Univ. University.]