“…This capability offers constructing new meta materials with special performance for vibration control (Bergamini, 2014) or acoustic shield with applications in designing elastic filters, wave guides, mirrors, and transducers. Similarly, several phenomena such as guiding (Torres, 1999); (Kafesaki 2000); (Khelif, 2003), bending (Miyashita, 2002), (Khelif, 2004), filtering (Khelif, 2002); (Khelif, 2003), demultiplexing (Pennec, 2004), and super lenses of acoustic waves (Pennec, 2005) have been predicted, so far. In addition, phononic crystals can tailor the allowed modes and their wave speeds inside the material, in such a way that the frequencies of various material loss subjected to different regimes to be matched with the density of some states and frequencies of some modes provide enhanced energy absorption (Thomas et al, 2011).…”