Characterization of an underwater metamaterial made of aluminum honeycomb panels at low frequencies.

Journal Article (Journal Article)

This paper presents a method to characterize the effective properties of inertial acoustic metamaterial unit cells for underwater operation. The method is manifested by a fast and reliable parameter retrieval procedure utilizing both numerical simulations and measurements. The effectiveness of the method was proved to be self-consistent by a metamaterial unit cell composed of aluminum honeycomb panels with soft rubber spacers. Simulated results agree well with the measured responses of this metamaterial in a water-filled resonator tube. A sub-unity density ratio and an anisotropic mass density are simultaneously achieved by the metamaterial unit cell, making it useful in implementations of transformation acoustics. The metamaterial, together with the approach for its characterization, are expected to be useful for underwater acoustic devices.

Full Text

Duke Authors

Cited Authors

  • Cushing, CW; Wilson, PS; Haberman, MR; Shen, C; Li, J; Cummer, SA; Tan, ZJ; Ma, C; Du, H; Fang, NX

Published Date

  • March 2021

Published In

Volume / Issue

  • 149 / 3

Start / End Page

  • 1829 -

PubMed ID

  • 33765814

Electronic International Standard Serial Number (EISSN)

  • 1520-8524

International Standard Serial Number (ISSN)

  • 0001-4966

Digital Object Identifier (DOI)

  • 10.1121/10.0003629

Language

  • eng