Reflection and Refraction of Sound by a Nonequilibrium Relaxing Medium

TLDR: In this paper, the reflection and refraction of a plane sound wave by a nonequilibrium relaxing medium are examined, and Snell's law of refraction is modified depending not only on the properties of the media, but also on the angle of incidence.

Abstract: The reflection and refraction of a plane sound wave by a nonequilibrium relaxing medium are examined. Since the medium is dissipative, Snell's law of refraction is modified depending not only on the properties of the media, but also on the angle of incidence. The amplitudes of the reflected and refracted waves are complex. Variations of both the angle and amplitude are analyzed and supplemented with calculations for different reaction rates and relative Mach numbers.