Although the first studies of them date back to a half century ago to Viselago, metamaterials represent a new solution in applied acoustics and noise control fields. In this paper, after a brief introduction to the state of art of metamaterials for acoustic applications, the sound attenuation of an acoustic barrier made following metamaterial rules is investigated. A 1:10 scale model was built using cylindrical bars, 30 cm high and 1.5 cm in diameter. The length of the barrier was 100 cm. The barrier was investigated for four combinations of the rows of the bars, spacing bars to create different regular geometries. The insertion losses of each configuration are reported.
Sound attenuation of an acoustic barrier made with metamaterials
Iannace G.
;Ciaburro G.;
2019
Abstract
Although the first studies of them date back to a half century ago to Viselago, metamaterials represent a new solution in applied acoustics and noise control fields. In this paper, after a brief introduction to the state of art of metamaterials for acoustic applications, the sound attenuation of an acoustic barrier made following metamaterial rules is investigated. A 1:10 scale model was built using cylindrical bars, 30 cm high and 1.5 cm in diameter. The length of the barrier was 100 cm. The barrier was investigated for four combinations of the rows of the bars, spacing bars to create different regular geometries. The insertion losses of each configuration are reported.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
