Numerical analyses of the local audible sound field generated by a parametric loudspeaker

Abstract

Parametric loudspeakers create localized audible sound fields by using ultrasound characteristics. This sound field is governed by Westervelt equation. In this paper, we use an approximation to Westervelt equation by separating the linear terms and the nonlinear terms, and solve the initial value problem via FDTD. We also verify the reproduction of the audible sound field created by parametric loudspeakers.