Sound Transmission Loss Calculation for Metamaterial Plate Using Combined Analytical and Numerical Approach
2022
scientific article
english
- locally resonant structures
- metamaterials
- sound transmission loss
- simulations
- diffuse field
EN In recent years acoustic metamaterials are broadly investigated in many different fields of acoustics and one of them is noise and vibration mitigation. The solution with highest potential are locally resonant metamaterials (LRS), which by creation of band gap effect in flexural wave propagation in structure improve its Sound Transmission Loss (STL). Standard STL simulation procedures can be fully analytical or numerical. Analytical solution, when it comes to metamaterial modelling, is fast but it does not take into consideration metamaterial geometry. On the other hand numerical solution even when considering small part of periodic structure, is time consuming and can generate numerical errors related for example to the mesh. In this work combined analytical – numerical method is analysed as the alternative for STL calculation. This method can be a substitute for basic simulation procedures concerning vibroacoustic metamaterials, since the simulations results are comparable and it is less time consuming method. Formulas and simulation procedure for the presented method are described and compared with analytical and numerical simulation results as well as with STL measurement results.
2022314-1 - 2022314-8
article number: 2022314
CC BY (attribution alone)
open journal
final published version
public
70