Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency

Figure 5

Planar acoustic lens. (a) The squared absolute pressure field of reflected waves. The red arrows represent the propagation direction of incident plane wave. (b) The transient pressure field distribution of reflected waves. The black dashed arc indicates the shape of reflected wavefront. (c) The longitudinal sound intensity distribution at = 0. (d) The transverse distribution of intensity at = 2000 mm.

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