Title：Acoustic Meta Materials
Time：9:30 to 10:30, Mar.13, 2019
Place ：F210, School of Mechanical Engineering 
Host：JIANG Weikang, Professor (Institute of Vibration, Shock & Noise)

Biography
Prof. Chris R. Fuller finished his B.E. (Hons) and Ph.D. at Adelaide University, Australia in 1974 and 1978  respectively. His Ph.D. topic concerned re-active attenuation of sound in ducts. He then spent three years at the ISVR, University of Southampton, England as a Research Fellow studying coupled vibrations in fluid-filled cylinders. After this Prof. Fuller moved to the U.S. where he worked at NASA Langley Research Center as an NRC Research Associate for two years studying control of aircraft inlet and interior noise. In 1983 he accepted a faculty position at Virginia Tech in Blacksburg, Virginia where he was from 1996 to 2011 the Roanoke Electric Steel Professor of Mechanical Engineering. In January, 2011 Prof. Fuller became the Virginia Tech Samuel Langley Distinguished Professor at the National Institute of Aerospace, a position funded by NASA. As the SLP Prof. Fuller interacts daily with NASA Langley staff. Prof. Fuller is also the Director of the Bruel & Kjaer Center for Aerospace Acoustics and Vibration where his current research interests are in active control of sound and vibration, advanced active composite materials, multi-functional material systems, adaptive structures, noise in medical systems and noise in aerospace systems. Prof. Fuller has authored over one hundred and seventy papers in various major technical journals and holds over ten patents in active control, four of which are in commercial use. He is the pioneer of two major fields in acoustics and vibration; “Active Structural Acoustic Control” and more recently “Heterogeneous Composite Materials for Passive Sound and Vibration Control”. He is a Fellow of the Acoustical Society of America and an Associate Fellow of the AIAA. Prof. Fuller has served on the Board of Directors of the International Institute of Sound and Vibration and the Institute of Noise Control Engineers. He is the lead author of the text Active Control of Vibration published by Academic Press. Prof. Fuller is considered a leading world expert in acoustics, vibration and active control and regularly presents keynote talks at major conferences. Prof. Fuller has taught over a dozen short courses in active noise and vibration control in the US, Japan, Europe and Australia. He has worked on substantial consulting projects for a number of large companies such as Ford, Mercedes Benz, GM (automobiles), Airbus, Boeing, Cessna (aircraft), United Launch Alliance, Boeing Space and Communications, Lockheed Martin (launch vehicles and space craft) and Harman, JBL, Siemens (audio electronics). Recently he received the 2017 ASME Rayleigh Award for his work in acoustics.

Abstract
Acoustic meta materials (AMM) are commonly defined as “materials that have properties not readily available in nature”. As such AMM show high potential for developing new classes of passive acoustic materials with improved, designable properties such as absorption, transmission loss and diffraction. The designable nature of AMM makes them particularly attractive for use for noise control in industry. To this date work in AMM has focused on research and there is very little development of products, mainly due to scalability and difficulties in bulk manufacturing. In this presentation the concepts and early work in AMM will be reviewed. The analytical developments and application of Transformational Acoustics to designing AMM will be briefly described. Recent work in developing poro-elastic AMM which have potential to be productized will be discussed as well as the use of Transformational Acoustics in designing absorbing materials with solid material matrices. Some new, promising directions in AMM will be briefly outlined.