Ramesh K. Agarwal
Washington University, USA
Title: Acoustic metamaterials membranes for low frequency sound attenuation
Biography
Biography: Ramesh K. Agarwal
Abstract
Low frequency noise has long been regarded as a form of noise pollution due to its high penetrating power. The reduction of low frequency noise from aircraft and automobile engines remains a challenge since the conventional acoustic liners are not able to absorb the low frequency noise radiation. Membrane-type acoustic metamaterials (MAMs) have demonstrated unusual capacity in controlling low-frequency sound transmission and reflection. The MAM is composed of a pre-stretched elastic membrane with attached rigid masses. In this keynote paper, the problems associated with low frequency noise will be discussed. The recent analytical/computational/experimental research on acoustic metamaterial membranes in controlling and attenuating the low frequency noise will be presented
