Conformally Mapped Multifunctional Acoustic Metamaterial Lens for Spectral Sound Guiding and Talbot Effect
Acoustic Talbot effect. (a) The simulated absolute sound pressure distribution for the lens with the perfect continuous index profile. (b) The simulated acoustic field distribution in the designed Mikaelian lens (,, is the width of each incident beam, and is the width of the hard boundary between each two incident sources). (c) The experimentally measured absolute sound pressure distribution for the area marked with the cyan box denoted in (b). (d) The normalized for the dotted lines marked in (a–c).