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Published August 22, 2022 | public
Journal Article

Tunable auxetic metamaterials for simultaneous attenuation of airborne sound and elastic vibrations in all directions

Abstract

Through a combination of analytical, numerical, and experimental methods, we study a three-dimensional metamaterial with the ability to attenuate both airborne sound and mechanical vibrations, simultaneously, and in all directions. In addition, due to the auxetic nature of the design (i.e., having a negative Poisson's ratio), the metamaterial can shrink (or expand) in a relatively uniform manner, without buckling. We utilize an external load to cause a systematic shape change in the metamaterial and tune the attenuation frequency bands. The presented design principles can be utilized in many applications related to acoustic and elastic wave manipulation as well as acoustic devices.

Additional Information

The authors are grateful for the contributions of L. Ulrich to this project through his M.Sc. thesis work. M.K. and O.R.B. acknowledge support from UConn start-up package (O.R.B.) and C.D. acknowledges support from the US National Science Foundation, Grant No. EFRI-1741565.

Additional details

Created:
August 22, 2023
Modified:
October 24, 2023