We study acoustic vortex in media with screw dislocation using the Katanaev-Volovich theory of defects. It is shown that the screw dislocation affects the beam's orbital angular momentum and changes the acoustic vortex strength. This change is a manifestation of topological Dirac phase and is robust against fluctuations in the system.
@article{arxiv.1306.3038,
title = {The effect of Dirac phase on acoustic vortex in media with screw dislocation},
author = {Reza Torabi and Zahra Rezaei},
journal= {arXiv preprint arXiv:1306.3038},
year = {2015}
}