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Simulating propagation of acoustic waves via solving a system ofthree-coupled first-order linear differential equations using a k-spacepseudo-spectral method is popular for biomedical applications, firstly becauseof availability of an open-source toolbox for implementation of this numericalapproach, and secondly because of its efficiency. The k-space pseudo-spectralmethod is efficient, because it allows coarser computational grids and largertime steps than finite difference and finite element methods for the sameaccuracy. The goal of this study is to compare this numerical wave solver withan analytical solution to the wave equation using the Green's function forcomputing propagation of acoustic waves in homogeneous media. This comparisonis done in the frequency domain. Using the k-Wave solver, a match to theGreen's function is obtained after modifying the approach taken for includingmass source in the linearised equation of continuity (conservation of mass) inthe associated system of wave equations.

A note on an open-source toolbox for simulation of acoustic waves: inclusion of time-varying source