This letter proposed advantageous in-uniform gradient cross-section (GCS) channels which
weaken the dependence of the coiled-up anechoic metasurface on the total channel length …

We theoretically and experimentally propose two designs of broadband low-frequency
acoustic metasurface coiled absorbers (Sample I/Sample II) for the frequency ranges of 460 …

LDOS is a fundamental spectral property that plays a central role in various physical
phenomena, such as wave-matter interactions and spontaneous emissions. The role of …

The absorption of low-frequency noise has always been limited by structural thickness, but
the novel physical properties of sound-absorbing metamaterials provide a solution to this …

Directional sound beam emission from compact devices is highly desirable in many practical
acoustic applications. Here, we present an approach for the efficient control of arbitrary multi …

High‐efficiency sound emission is crucial in practical scenarios, such as sonar system and
acoustic communication. However, the efficient emission of the low‐frequency sound source …

The acoustic surface waves supported by hard surfaces patterned with repeat-period,
meandering grooves are explored. The single, continuous groove forms a glide-symmetric …

We present a rigorous analytical model for understanding the multipole emission
enhancement of sound using acoustic metamaterials. A two-dimensional cylindrical …

We design a solid mazelike rod to achieve sound superscattering. Because of the near
degeneracy of resonances in multiple channels in the solid mazelike rod, the scattering …

Recent developments in metamaterial research have shown promising progress in
overcoming the fundamental physical limitations of acoustics. While the majority of this …