We prepared a 2D steel/air system phononic crystal model based on the Bragg reflection mechanism. The crystal lattice constant has the same size as the sound wavelength,and the struc-ture can be modulated in two directions.

• 基于布拉格反射机理,自行制备了晶格常数同声波波长同数量级的二维钢/空气体系声子晶体结构模型,该模型具有双向可调性。