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Updated: Apr 25, 2026

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
Giant acoustic concentration by extraordinary transmission in zero-mass metamaterials
Jong Jin Park1, K J B Lee2, Oliver B Wright3
1Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea.
Abstract:
We demonstrate 97%, 89%, and 76% transmission of sound amplitude in air through walls perforated with subwavelength holes of areal coverage fractions 0.10, 0.03, and 0.01, respectively, producing 94-, 950-, and 5700-fold intensity enhancements therein. This remarkable level of extraordinary acoustic transmission is achieved with thin tensioned circular membranes, making the mass of the air in the holes effectively vanish. Imaging the pressure field confirms incident-angle independent transmission, thus realizing a bona fide invisible wall. Applications include high-resolution acoustic sensing.
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