Fig. 1: Schematic of superwavelength self-healing effect of spoof surface sonic Airy-Talbot waves.

a The metasurface consisting of Helmholtz resonators (HRs) above which the spoof surface sonic Airy-Talbot waves are launched. The red line denotes the distribution of the incident sound waves’ amplitude which resumes to its original shape at regular distances. The image of the speakers is created with Adobe Photoshop 2022. b Zoomed-in view of the metasurface shown in (a). The lower-right inset shows the unit cell and the upper-right inset shows the corresponding first Brillouin zone. c Dispersion curve of the metasurface, where the symbols, blue and red lines represent the theoretical, numerical results and air line, respectively. Pressure amplitude plots and profiles at two self-imaging planes of transmitting d, e one and f, g two Airy beams, respectively.