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

Phononic crystals (PCs) and metamaterials (MMs) can exhibit abnormal properties, even far
beyond those found in nature, through artificial design of the topology or ordered structure of …

Within a time span of 15 years, acoustic metamaterials have emerged from academic
curiosity to become an active field driven by scientific discoveries and diverse application …

Acoustic metamaterials (AMs), which are materials composed of subwavelength periodic
artificial structures with specific designs, have drawn significant research attention. This is …

An impedance-matched surface has the property that an incident wave generates no
reflection. Here we demonstrate that by using a simple construction, an acoustically …

Acoustic metamaterials offer great flexibility for manipulating sound waves and promise
unprecedented functionality, ranging from transformation acoustics, super-resolution …

Recently, with advances in acoustic metamaterial science, the possibility of sound
attenuation using subwavelength structures, while maintaining permeability to air, has been …

In this Letter, we theoretically propose and experimentally demonstrate a three-dimensional
soundproof acoustic cage structure, hereby denoted as an acoustic metacage. The …

We report the experimental realization of perfect sound absorption by sub-wavelength
monopole and dipole resonators that exhibit degenerate resonant frequencies. This is …

Acoustic metamaterial science is an emerging field at the frontier of modern acoustics. It
provides a prominent platform for acoustic wave control in subwavelength-sized …