Peculiar transmission property of acoustic waves in a one-dimensional layered phononic crystal

✍ Scribed by Degang Zhao; Wengang Wang; Zhengyou Liu; Jing Shi; Weijia Wen

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 246 KB
• Volume: 390
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.08.009

✦ Synopsis

In this article, we report both theoretical calculation and experimental observation of acoustic waves abnormally through a onedimensional layered transmitted phononic crystal at frequencies within the band gap into a material of large acoustic impedance mismatch, with an efficiency as high as unity. The transmission peaks can be interpreted as a result of the interference of acoustic waves reflected from all periodically aligned interfaces. The condition for the appearance of peaks is analyzed in detail and the optimized layer number is given for different configurations.