Reconfigurable Origami-Inspired Metamaterials for Controllable Sound Manipulation
Résumé
Creating complex spatial objects from a flat sheet of material using origami folding techniques has attracted attention in science and engineering. We design, model, and fabricate reconfigurable origami-inspired metamaterials whose unit cells can be easily tailored into numerous specific shapes. Via combinations of different shapes of the unit cell in the metamaterial panel, we numerically and experimentally demonstrate various specific sound wave manipulations, including acoustic focusing, beam splitting, sound localization, and one-way transmission. Our design features simple configuration, tunable structure, multiple functionalities, and is light weight. This finding provides an alternative route for controllable sound manipulation, paving the way toward a reconfigurable functional metadevice based on origami-inspired metamaterials.