Acoustic meta-atom with experimentally verified maximum Willis coupling

Anton Melnikov; Yan Kei Chiang; Li Quan; Sebastian Oberst; Andrea Alù; Steffen Marburg; David Powell

doi:10.1038/s41467-019-10915-5

Nature Communications (Jul 2019)

Acoustic meta-atom with experimentally verified maximum Willis coupling

Anton Melnikov,
Yan Kei Chiang,
Li Quan,
Sebastian Oberst,
Andrea Alù,
Steffen Marburg,
David Powell

Affiliations

Anton Melnikov: Vibroacoustics of Vehicles and Machines, Technical University of Munich
Yan Kei Chiang: School of Engineering and Information Technology, University of New South Wales
Li Quan: Department of Electrical and Computer Engineering, The University of Texas at Austin
Sebastian Oberst: Centre for Audio, Acoustics and Vibration University of Technology Sydney
Andrea Alù: Department of Electrical and Computer Engineering, The University of Texas at Austin
Steffen Marburg: Vibroacoustics of Vehicles and Machines, Technical University of Munich
David Powell: School of Engineering and Information Technology, University of New South Wales

DOI: https://doi.org/10.1038/s41467-019-10915-5
Journal volume & issue: Vol. 10, no. 1
pp. 1 – 7

Abstract

Read online

Willis coupling is an additional degree of freedom, which can enhance acoustic metamaterials, by coupling monopole and dipole excitations. Here, the authors experimentally demonstrate a meta-atom with Willis coupling approaching the theoretical maximum, which is robust to thermo-viscous losses.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

About the journal