Phononic crystals (PnCs) control the transport of sound and heat similar to the control of
electric currents by semiconductors and metals or light by photonic crystals. Basic and …

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 …

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 …

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

Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the
propagation of sound. However, the practical applications, eg for audible sound with large …

Finding new collective electronic states in materials is one of the fundamental goals of
condensed matter physics. Atomic-scale superlattices formed from transition metal oxides …

Over the past decade there has been a great amount of research effort devoted to the topic
of acoustic metamaterials (AMMs). The recent development of AMMs has enlightened the …

Effective transmission of sound from water to air is crucial for the enhancement of the
detection sensitivity of underwater sound. However, only 0.1% of the acoustic energy is …

In this paper, a well-designed low-frequency membrane-type acoustic metamaterial (MAM)
with continuous multi-state anti-resonance modes is proposed, which may effectively …

We numerically realize the acoustic rainbow trapping effect by tapping an air waveguide
with space-coiling metamaterials. Due to the high refractive-index of the space-coiling …