Abstract
The most usual method to reduce undesirable enviromental noise levels during its transmission is the use of acoustic barriers. A novel type of acoustic barrier based on sound transmission through subwavelength slits is presented. This system consists of two rows of periodic repetition of vertical rigid pickets separated by a slit of subwavelength width and with a misalignment between them. Here, both the experimental and the numerical analyses are presented. The acoustic barrier proposed can be easily built and is frequency tunable. The results demonstrated that the proposed barrier can be tuned to mitigate a band noise without excesive barrier thickness. The use of this system as an environmental acoustic barrier has certain advantages with regard to the ones currently used both from the constructive and the acoustical point of view.
Highlights
In last years, various alternatives have been proposed as soundproof subwavelength structures
A tunable acoustic barrier based on periodic arrays of subwavelength slits Constanza Rubio,a Antonio Uris, Pilar Candelas, Francisco Belmar, and Vicente Gomez-Lozano Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica
In this paper we present a new acoustic barrier based on subwavelength slits as an alternative to classical acoustic barriers and to sonic crystal ones
Summary
Various alternatives have been proposed as soundproof subwavelength structures. A tunable acoustic barrier based on periodic arrays of subwavelength slits
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