Sound Transmission of Coupled Membrane-Ring Structure : Experiment Analysis

• Main Authors: Yi-ChenYeh, 葉奕辰
• Other Authors: Jung-San Chen
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/91836340763812103592

碩士 === 國立成功大學 === 工程科學系 === 104 === In recent years, the emergence of membrane-type acoustic metamaterial, which has been a subject of widely-extended discussion, provides a novel way to isolate the low-frequency noise. In this study, I fabricated a novel structure called coupled membrane structure which is comprised of two membrane-type metamaterials. I used the acoustic impedance tube and Comsol Multiphysics, a finite element analysis software package, to examine its transmission loss (TL). Compared to the single-layer metamaterial, an extra TL peak and valley are occurred. I also discovered that the effect of the thermal-curing temperature and air spacing on the TL curves. A good agreement between experiment and simulation is achieved.