报告时间：2015年7月13日，下午4：30

报告地点：物理学院老楼201

报告简介：In this talk, I will present our recent works on membrane-type acoustic metamaterials (AMMs). First, I will talk about how to achieve near-zero density/index AMMs using membranes. We numerically show that such an AMM can be utilized to achieve angular filtering and manipulate wave-fronts. Next, I will talk about the design of an acoustic complimentary metamaterial (CMM). Such a CMM can be used to acoustically cancel out aberrating layers so that sound transmission can be greatly enhanced. This material could find usage in transcranial ultrasound beam focusing and non-destructive testing through metal layers. Finally, I will talk about our most recent work on using membrane-type AMMs for low frequency noise reduction. We integrated membranes with honeycomb structures to design simultaneously lightweight, strong, and soundproof AMMs. Experimental results will be shown to demonstrate the effectiveness of such an AMM.

报告人简介：Yun Jing received a B.S. degree in electronic science and engineering from Nanjing University,China, in 2006 and an M.S. degree from RensselaerPolytechnic Institute in 2007. He received his Ph.D. degree in architectural acoustics from Rensselaer Polytechnic Institute in 2009. Prior to joiningthe NC State faculty as an assistant professor in 2011, he was a research fellow at Brigham and Women's Hospital, Harvard Medical School. He specializes in the development of analytic and numerical methods for linear and nonlinear wave propagation in fluids. He is interested in biomedical ultrasound, acoustic metamaterials, architectural acoustics, nonlinear acoustics and noise control. He has published 27 journal articles and over 40 conference abstracts and papers. His work has been featured by the Wall street journal, scientific American, and Daily Mail.

邀请人：邱春印副教授