Investigation of geometrical factors effects on sound silencing behavior of mass attached membrane-type acoustic metamaterials

• Published in: The Journal of the Acoustical Society of America 2021-10, Vol.150 (4), p.A109-A109
• Main Authors: Aghamiri, Mohammad, Ghaffarivardavagh, Reza, Mahjoob, Mohammad J.
• Format: Article
• Language: English
• ISSN: 0001-4966; 1520-8524
• DOI: 10.1121/10.0007794

Membrane-type acoustic metamaterials have drawn significant attention in recent years due to their capacity in generating low frequency band gaps. To date, numerous analytical and numerical approaches have been developed to study and evaluate acoustic performance of this type of metamaterials toward improving their sound silencing behavior. In this paper, we have used point-wise matching method to study different geometrical factors of mass attached membrane and investigate how these factors contribute to the sound silencing behavior. Additionally, the full-wave simulation of these exotic mass-attached membranes are carried out to numerically validate the results. The paper herein, provides an insight on how tuning the geometrical parameter of mass-attached membrane yields broadening the silencing bandwidth. Developing wide-band membrane-type metamaterial pave the way for the emergence of myriad applications ranging from noise mitigation to acoustic energy harvesting.