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. 2016 May 20;7:11731. doi: 10.1038/ncomms11731

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(a) The simulated pressure field distribution of generated acoustic self-accelerating beam. The operating frequency is 4,170 Hz. The dashed line marks the curved trajectory. The result shows that the generation of acoustic self-accelerating beam is barely affected by the coupling between adjacent unit cells in the meta-lens (Supplementary Fig. 11). (b) Experimental measurements of the pressure field distribution. (c) The simulation demonstration of the self-healing properties of acoustic self-accelerating beam. Here, a rigid cylinder (diameter: 4 cm) is placed at (z, x)=(1.211, 0.175) (m) on the curved trajectory. (d) The experimental demonstration of the self-healing properties with the same-sized obstacle made of aluminium alloy.