Equation for acoustic propagation in inhomogeneous chemically active media with continuous distribution of relaxation losses

The work focuses on the derivation of a lossy wave equation for ultrasound absorption in media with the power law of absorption, which plays an important role in bio-medical applications. Possible forms of nonlinear lossy wave equations are also discussed. The properties of the non-linear pressure fields resulting from the implementation of different non-linearity models are investigated. This part of the study is illustrated with the numerical computations of the related linear and nonlinear equations.