Formation of collimated sound beams by three-dimensional sonic crystals

TL;DR

This paper presents both theoretical and experimental evidence that three-dimensional sonic crystals can effectively collimate sound beams near band edges, enabling high-quality sound source design.

Contribution

It introduces a novel approach demonstrating efficient sound beam collimation using 3D sonic crystals near band edges, combining theory and experiments.

Findings

Successful experimental demonstration of beam collimation

Prediction of high spatial quality sound beams

Potential for designing advanced sound sources

Abstract

A theoretical and experimental study of the propagation of sound beams in- and behind three-dimensional sonic crystals at frequencies close to the band edges is presented. An efficient collimation of the beam behind the crystal is predicted and experimentally demonstrated. This effect could allow the design of sources of high spatial quality sound beams.