On the application domain of the Green’s function approximation for mild anisotropic media [Comments to the article ‘‘On Green’s functions for elastic waves in anisotropic media,’’ J. Acoust. Soc. Am. 8 3, 118–121 (1988)

Abstract

A Green’s function for anisotropic media was developed for materials having no cusps in the energy velocity profile and exhibiting a mild anisotropy, that is with a relatively small deviation of the quasilongitudinal wave velocity from its averaged value. A scaling transform is introduced that allows severe anisotropy to be considered.