Abstract
In recent years, many solutions have been developed to reduce noise from different sources. One
of these solutions is acoustic barriers. An acoustic barrier is a structure designed to reduce noise
transmission between areas by blocking the direct path of sound. Open acoustic barriers are a
valuable solution for technical and industrial plants. They allow airflow and visibility. Given
the need for localized attenuation in these environments, it is possible to use numerical models
to improve effectiveness and thus increase insertion loss in a region of interest. This study has
used numerical simulation tools to provide degrees of freedom in placing the different elements of
a subsonic slit-based open barrier. It has been shown that by rotating some of the elements and
determining an area of interest, it is possible to improve the effectiveness of the barrier. These results
allow using all the elements with the same topology to attack noise pollution problems individually
in their location and frequency range.
