Analysis of Acoustic Wave Generation by Low Frequency Air-coupled Transducers

Abstract

In this paper phenomenon of acoustic waves generation in the air by low-frequency air-coupled transducers (ACT) is investigated. Numerical modelling of acoustic waves propagation in the air was investigated in the COMSOL Multiphysics software. The propagation of acoustic waves generated by a single ACT was modelled, to consider its angular pressure characteristics. Furthermore, the process of acoustic waves generation by multiple ACTs was investigated. Numerical results were validated by experimental measurements based on the scanning laser Doppler vibrometry using the acousto-optic phenomenon. The results of this research are focused on the elastic wave generation in the structures by ACT and are targeted towards non-destructive testing.