The hybrid aeroacoustic approach is an efficient way to address the issue of disparity scales in Computational AeroAcoustics (CAA) at low Mach numbers. In present paper, three wave equations governing propagation flow-induced sound number flows, namely Perturbed Convective Wave Equation (PCWE), Ribner’s Dilatation (RIB) equation, and Lighthill’s are applied using Finite Element Method (FEM). An...