José Sánchez-Dehesa

TL;DR: In this article, the authors present an experimental analysis of the acoustic transmission of a two-dimensional periodic array of rigid cylinders in air with two different geometrical configurations: square and triangular.

TL;DR: In this paper, the authors proposed a multilayered composite made of two types of isotropic acoustic metamaterials, whose elastic parameters should be properly chosen in order to satisfy (in the homogenization limit) the acoustic properties under request.

TL;DR: It is observed that the transmittance spectra show very asymmetric peaks which are explained as a Fano-like interference phenomenon, and a finite difference time domain method is employed to perform a comprehensive study of the resonance line shape as a function of the mass density of the structural units.

TL;DR: In this paper, it is shown that a sonic crystal made of periodic distributions of rigid cylinders in air acts as a new material which allows the construction of refractive acoustic devices for airborne sound.

TL;DR: In this article, the elastic properties of cylinders are taken into account and a gradient index lens for airborne sound is proposed, whose functionality is demonstrated by multiple scattering simulations, and it is shown that metamaterials with perfect matching of impedance with air are possible by using aerogel and rigid cylinders equally distributed in a square lattice.