Fig. 4 | Nature Communications

Fig. 4

From: Fine manipulation of sound via lossy metamaterials with independent and arbitrary reflection amplitude and phase

Fig. 4

Multifocal acoustic focusing. a Amplitude and phase profiles at the surface of the LAM for multifocal acoustic focusing. b Simulated multifocal acoustic focusing by the APM method. Scale bar, 3 cm. c Simulated multifocal acoustic focusing by the PM method. d Distributions of pressure amplitude on the dashed lines in b and c. Three target focal points are marked by triangles