Е-Публикации
Технически университет - София

Abstract: Reflected traffic noise from acoustic barriers usually leads to increasing of the noise level before the barrier due to combined effect of source and reflected noise. This could affect a lot of people – drivers and passengers. Some times their number is many times bigger than the number of affected people behind the barrier. One of the existed solutions is use of expensive combined noise barriers of high degree of absorption. In this study, a new passive transport noise barrier having high level of reduction of the reflected noise is treated. Noise reduction efficiency is done by appropriate design of the barrier profile performing source and reflected acoustic waves interference in small volumes near the barrier. In addition, these volumes of intensive acoustic waves interference near the barrier have frequency bands of high acoustic energy levels and are suitable for energy harvesters’ usage. Through numerical simulation and experimental validation, an analyses of the acoustic energ

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