We report the theoretical design and experimental demonstration of a three-dimensional
(3D) omnidirectional and broadband metamaterial-based concentrator for airborne sound …

Underwater sound absorption is becoming more and more important for underwater military
equipment. Underwater acoustic stealth technology is constantly developing, we have …

We propose a virtual sound barrier system that blocks sound transmission through openings
without affecting access, light and air circulation. The proposed system applies active control …

Here in locally resonant acoustic material, it is shown that effective zero refractive index can
be constructed by the resonant unit-cells with coherent degenerate monopole–dipole …

In this paper, we proposed the implementation of a two-dimensional omnidirectional and
broadband acoustic absorber using graded index phononic crystals as the shell with an …

Locally resonant acoustic metamaterials with multi-resonators are generally regarded as a
fine trend for managing the bandgaps, the different effects of relevant structural parameters …

We present a homogenization method for periodic acoustic composites based on the Plane
Wave Expansion (PWE) method. We show that the description of periodic acoustic …

The acoustic analog of the quantum black hole for airborne sound in two dimensions was
denominated as an omnidirectional acoustic absorber by Climente et al.[see Appl. Phys …

We design a two-dimensional broadband acoustic omnidirectional absorber (AOA) simply
comprising homogeneous anisotropic metamaterials to enlarge the absorption cross-section …

We demonstrate a conformally mapped multifunctional acoustic metamaterial Mikaelian
lens. Mikaelian lens is a gradient medium with a hyperbolic secant refractive index profile …