Some information on acoustic topological insulator

In this exceedingly short review article, we have provided some information on acoustic topological insulator for pedagogical purpose. Since, intrinsically acoustic systems do not have Kramers doublets due to spin-zero status, artificially acoustic spin-half states could be engineered as reported in refs. 5-26 maintaining time reversal symmetry. The high point of this article is an explanation of emergent Dirac physics in acoustic topological insulators.