Retrieving Effective Acoustic Impedance and Refractive Index for Size Mismatch Samples

12/26/2021
by   Mohammad Javad Khodaei, et al.
0

In this paper, we have presented an analytical solution to extract the effective properties of acoustic metamaterials from the measured complex transmission and reflection coefficients when the metamaterial and impedance tube have different sizes. We have first modeled this problem as a bilayer metamaterial located inside a duct and treated the air gap as a separate domain. Then we have mathematically proved that the effective properties of acoustic metamaterial can be obtained by solving a set of eight linear equations when the dimensions are known. Finally, we have evaluated the proposed method with results from numerical simulations. It is shown that the proposed method can calculate the effective refractive index and impedance with an error of below 1%. This method provides an efficient approach to analyzing the effective properties of acoustic metamaterials of various sizes.

READ FULL TEXT

page 1

page 2

page 3

page 4

research
04/03/2021

Homogenization of the vibro-acoustic transmission on periodically perforated elastic plates with arrays of resonators

Based on our previous work, we propose a homogenized model of acoustic w...
research
08/06/2020

Efficient multiscale algorithms for simulating nonlocal optical response of metallic nanostructure arrays

In this paper, we consider numerical simulations of the nonlocal optical...
research
03/07/2023

Kernel interpolation of acoustic transfer functions with adaptive kernel for directed and residual reverberations

An interpolation method for region-to-region acoustic transfer functions...
research
05/30/2018

Acoustic Scene Analysis Using Partially Connected Microphones Based on Graph Cepstrum

In this paper, we propose an effective and robust method for acoustic sc...
research
01/01/2019

Homogenization of the vibro-acoustic transmission on perforated plates

The paper deals with modelling of acoustic waves which propagate in invi...
research
06/24/2022

How to hide your voice: Noise-cancelling bird photography blind

Getting close to birds is a great challenge in wildlife photography. Bir...
research
01/30/2020

Graph Cepstrum: Spatial Feature Extracted from Partially Connected Microphones

In this paper, we propose an effective and robust method of spatial feat...

Please sign up or login with your details

Forgot password? Click here to reset