Sensors, Vol. 19, Pages 788: Compact Acoustic Rainbow Trapping in a Bioinspired Spiral Array of Graded Locally Resonant Metamaterials

Authors: Liuxian Zhao Shengxi Zhou Acoustic rainbow trappers, based on frequency selective structures with graded geometries and/or properties, can filter mechanical waves spectrally and spatially to reduce noise and interference in receivers. These structures are especially useful as passive, always-on sensors in applications such as structural health monitoring. For devices that face space and weight constraints, such as microelectromechanical systems (MEMS) transducers and artificial cochleae, the rainbow trapping structures must be compact as well. To address this requirement, we investigated the frequency selection properties of a space-saving design consisting of Helmholtz resonators arranged at sub-wavelength intervals along a cochlear-inspired spiral tube. The height of the...

MedWorm Message: Have you tried our new medical search engine? More powerful than before. Log on with your social media account. 100% free.

from #Head and Neck by Sfakianakis via simeraentaxei on Inoreader http://bit.ly/2tmlMD4