The design and analysis of acoustic diode of one-dimensional structure

• Main Authors: Shin-Bin Wu, 吳世彬
• Other Authors: Pi-Gang Luan
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/56019372874836398449

碩士 === 國立中央大學 === 光電科學研究所 === 99 === We discuss the design and analysis of acoustic diodes consisted of one-dimensional elastic periodic structure. An acoustic diode is formed by coupling a periodic medium that consists of water and glass layers with an appropriately chosen nonlinear acoustic medium. The rectifying efficiency of acoustic wave is determined by the band-gap effect of the phononic crystal and the properties of the nonlinear acoustic medium. We compare the results of different incidence angles of the acoustic wave and analyze the influences of various physical parameters on the rectifying efficiency. We also discuss the analysis and illustration of acoustic diode for random situations. Acoustic diode has high adjustability. We can get desired rectifying efficiency by properly choosing the material and structure parameters. Acoustic diode can be applied to protect acoustic devices, and may play a role in the future applications of biology research or medical therapy.