By measuring the velocity of the P wave and S wave on the three orthotropic different directions including parallel and vertical direction to the stratum of the compacted rock samples including slate

phyllite

mylonite and metasandstone

the two obvious anisotropy effects of P wave and S wave velocity are put forward. One is the conformity of the anisotropy of P wave and S wave velocity expressed by that the anisotropic indexes of S wave velocity would linearly increase as the P wave anisotropic indexes increase in a great degree

namely the anisotropy of S wave velocity is statistically proportional to that of P wave; the other effect is the variation between P wave and S wave velocity anisotropy

which is mainly expressed by that the anisotropic index of the P wave velocity is usually greater than S wave in the parallel and vertical directions to the stratum of the rock samples which means that the anisotropy of S wave velocity is inferior to that of P wave. Using numerical value test based on the wave velocity function of the transverse isotropic elastic medium

the two effects are validated.