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Updated: Oct 8, 2025

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
Acoustic radiation from a cylindrical shell with a voided soft elastic coating
Gyani Shankar Sharma1, Adrien Marsick2, Laurent Maxit2
1School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia.
Abstract:
An analytical framework for sound radiation from a fluid-loaded cylindrical shell covered with an acoustic coating is presented. The coating is composed of a soft elastic material embedded with a circumferential layer of equispaced voids. The layer of voids is modeled as an effective fluid medium sandwiched between two layers of the host material. Expressions for the effective impedance of the coating, radial displacement of the elastic shell, and the structure-borne radiated pressure for harmonic excitation of the shell are derived. Results show that the coating design can be tuned to reduce the radiated sound in a broad frequency range.
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