The behavior of the acoustic anisotropy and the longitudinal wave velocity in the case of multiaxial stress-strain state of the plate under inelastic deformation has been studied experimentally. The plate had a stress concentrator in the form of the central hole. The results for a number of deformation levels, and the results of finite element analysis of active stresses were presented. The qualitative agreement between calculated stress fields and the distribution fields of acoustic anisotropy was revealed. It was found that the maximum in magnitude of acoustic anisotropy values fell on the areas with the greatest stresses near the concentrator. It was supposed that the non-uniform distribution of the acoustic anisotropy in material testified to a possible stress concentration at the corresponding points.