Numerical and experimental methods to measure the acoustic performance of sonic crystal noise barrier

Abstract

The array of periodic scatterers is known as sonic crystal at present and sonic crystal is the most cost-effective solution for a “noise barrier” because of its acoustic attenuation due to size, geometry, and periodic arrangement of scatterers. The simulation methods to estimate acoustic attenuation and the Bragg band of the periodic scatterers have been demonstrated in this paper. First, the periodic cylindrical and C-shaped scatterers have been studied along with the effect of thermo-viscous losses to establish the simulation method. Next, in the laboratory environment, the measurements have been carried out for periodic cylindrical and C-shaped scatterers and the experimental results are in good agreement with simulation results.