Acoustic wave transmission tuning in a onedimensional system using two parallelepiped copper local resonators

In this work, we explore the optimization of acoustic wave transmission in a one-dimensional system using two parallelepiped copper local resonators. We use the theoretical analysis based on the transfer matrix method to calculate the transmission rate of acoustic waves. The results show that the eigen modes shift towards lower frequencies with the variation of the lengths of the patches, and towards higher frequencies as their height increases. This work aims to introduce fine copper plates, mounted flush on the walls of a duct, to create frequency stop bands in a specific range. This novel approach aims to optimize acoustic wave propagation in one-dimensional waveguide structures, and the results are significant for improving acoustic transmission.