Modelado de paneles acústicos ranurados

Abstract

The acoustic behaviour of common porous media is highly dependent on their open porosity, this consisting of an interconnected network of pores including kinematic and dead-end porosities. A properly chosen dead-end porosity can help enhance the sound absorption properties of such materials because of the thermal exchanges between the fluids filling each of these pores. This work presents a model to deal with previous situations for the specific case of rigid panels with periodically arranged circular holes containing slit-like dead-end pores. Analytical solutions describing acoustic wave propagation in pores of circular cross-section and slits are used together to this end. Preliminary results show the absorption capability of these systems, making them an interesting alternative to traditional perforated panel solutions. Additionally, the model is proven to be a useful tool to estimate their acoustic properties in a simple manner that can also be extended to other geometry cases.