title: Refractive acoustic devices for airborne sound.
abstract: We show 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. It is demonstrated that, in the long-wave regime, the crystal has low impedance and the sound is transmitted at subsonic velocities. Here, the fabrication and characterization of a convergent lens are presented. Also, an example of a Fabry-Perot interferometer based on this crystal is analyzed. It is concluded that refractive devices based on sonic crystals behave in a manner similar to that of optical systems.
authors.affiliation: Centro Tecnológico de Ondas, Unidad Asociada de Investigación (CSIC-UPV), Edificio de Institutos II, Universidad Politécnica de Valencia, E-46022 Valencia, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Cervera
authors.forename: L
authors.initials: L
authors.lastname: Sanchis
authors.forename: J V
authors.initials: JV
authors.lastname: Sánchez-Pérez
authors.forename: R
authors.initials: R
authors.lastname: Martínez-Sala
authors.forename: C
authors.initials: C
authors.lastname: Rubio
authors.forename: F
authors.initials: F
authors.lastname: Meseguer
authors.forename: C
authors.initials: C
authors.lastname: López
authors.forename: D
authors.initials: D
authors.lastname: Caballero
authors.forename: J
authors.initials: J
authors.lastname: Sánchez-Dehesa