Fig. 1: Acoustic Lattice Resonances.
From: Acoustic lattice resonances and generalised Rayleigh–Bloch waves
a, b Normalised load on central cylinder from the finite element method (FEM) (blue—with point source) and method in ref. 13 (orange—with plane wave source), for an 11 scatterer array with r/a = 0.15, 0.35. c, d Analogous finite element (FE) curves (blue) on disordered array and experimental results (orange). The band edges and standing-wave frequencies from the infinitely periodic analogue are shown in dashed and dotted lines, respectively. Array schematics shown above panels. e, f Normalised absolute acoustic pressure field (colorscale) from FE method at frequencies marked with circle in (a, b) respectively. g, h Analogous multiple wave scattering simulations but with radii scaled rather than separation. Point source excitation is to the left of each array.
