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

Acoustic resonances in open systems, which are usually associated with resonant modes
characterized by complex eigenfrequencies, play a fundamental role in manipulating …

Multifunctional materials are in high demand for practical engineering applications. Owing to
the ubiquitous noise and impact energy hazards in many settings, traditional materials and …

Broadband sound sink/absorber via a structure with deep sub-wavelength thickness is of
great and continuing interest in physics and engineering communities. An intuitive technique …

Although mutually independent, simultaneous sound absorption and superior mechanical
properties are often sought after in a material. One main challenge in achieving such a …

Causality of linear time-invariant systems inherently defines the wave-matter interaction
process in wave physics. This principle imposes strict constraints on the interfacial response …

Acoustic perfect absorption via a structure with deep subwavelength thickness is of great
and continuing interest in research and engineering. This study analytically and …

It is of significance, but still remains a key challenge, to attain excellent sound-absorbing and
mechanical properties in a material simultaneously. To overcome this challenge, herein …

Initially proposed to achieve strong noise isolation levels beyond the mass-density law,
acoustic metamaterials (AMMs) have now overturned the conventional views in all aspects …

By using a structured tungsten-polyurethane composite that is impedance matched to water
while simultaneously having a much slower longitudinal sound speed, we have theoretically …