Comparative analysis of the acoustic efficiency of classical and sonic crystal noise barriers

Abstract

This study presents a comparative analysis of the acoustic efficiency of classical and sonic crystal noise barriers conducted by means of numerical simulation. One of the most common solutions for transport noise reduction is the use of expensive combined noise barriers of high degree of reflection and absorption. Sonic Crystals are a relatively new type of noise barrier under development and investigation. In this study both types of barriers are compared on the basis of their area of application, noise level attenuation behind them, frequency response, technology of manufacturing, maintenance and price. Some of the characteristics are obtained through numerical simulations and experimental data, while others are available in published research studies. On the basis of the results conclusions about the application of sonic crystal noise barriers are made.