Noise pollution has become a significant global problem in recent years. Unfortunately,
conventional acoustic materials cannot offer substantial improvements in noise reduction …

In the past two decades, the research on acoustic metamaterials has flourished, which is
also benefited from the development of additive manufacturing technology. The exotic …

Acoustic metamaterials have been widely investigated over the past few decades and have
realized acoustic parameters that are not achievable using conventional materials. After …

Pentamode metamaterials (PMs), a kind of metafluids composed of complex solid medium,
have shown enormous potential for both elastic wave and underwater acoustic wave …

Pentamode metamaterials are a new class of artificially engineering three-dimensional
lattice composites. There exist a few types of pentamode metamaterials that are dominated …

Underwater acoustic plane waves are usually generated using transducer arrays with
sophisticated control and synchronizing systems. Here, a subwavelength metasurface is …

Efficiently receiving underwater sound remotely from air is a long‐standing challenge in
acoustics hindered by the large impedance mismatch at the water–air interface. Here, a …

We propose an underwater metamaterial combining aluminum foam and polyurea. Three
samples with different aluminum foam scatterers were prepared and tested for sound …

We present a practical design of an underwater acoustic carpet cloak with 2-dimensional
version of the pentamode lattice. The quasi-conformal transformation, which is achieved by …

A metamaterial of particular interest for underwater applications is the three-dimensional
(3D) anisotropic pentamode (PM), ie, a structure designed to support a single longitudinal …