Analysis of different metamaterials based on low frequency sound transmission loss using comsol multiphysics

Abstract

In this day and age noise reduction is an increasingly relevant and rapidly progressing sector of technology. It is necessary due to the numerous psychological benefits of a relatively quiet atmosphere. In this paper, we will be attempting to identify the best structures to induce maximum reduction of power in a sound wave prior to its transmission through the material. For this, we intend to use a simulation software and test out various permutations of the geometry and the material composition of two preselected metamaterials. Metamaterials are chosen due to their ability to allow us to alter the properties of an incident sound wave in unprecedented ways. They are considered state-of-the-art when it comes to noise reduction and in the manipulation of wave properties in general.