Propagation of acoustic waves in a von-K\'arm\'an vortex street like   configuration of disclinations
  We show that a simple model of 1D array of topological defects in a crystalline environment is able to guide acoustic waves, depending on the angle of the incident wave. We comment on a recently proposed geophysical mechanism explaining the mantle dynamics by the presence, in some crystalline materials there, of wedge disclinations. 
S\'ebastien Fumeron and Bertrand Berche and Fernando Moraes and   Fernando Santos and Erms Pereira
cond-mat.mtrl-sci