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This paper shows the behavior of the energy of normal modes of vibration, which constitute an elastic wave, when it undergoes dispersion in a granular media. For this, scattered radiation patterns between different pairs of modes are plotted and analyzed, highlighting the main directions of dispersion. For this, cross sections of modal dispersion W(iki, jkj) obtained by Trujillo and coworkers in 2013 was used. The normal modes implemented are the solutions of the problem of free vibrations of an elastic, homogeneous and isotropic plate, namely, horizontal shear modes and Lamb, which in turn can be symmetric or antisymmetric. This work aims to contribute to the understanding of the behavior of the internal structure of granular media, as well as potential applications in fields such as, soils mechanics, geophysics, seismology, and oil exploration, among others. [ABSTRACT FROM AUTHOR]