Fig. 3: Experimental setup and example scans.
From: Acoustic lattice resonances and generalised Rayleigh–Bloch waves
a Scanning xyz-stage and long array of 80 cylindrical acrylic rods in laser-cut stencils that set aspect ratio r/a. Dash-dotted line shows scan path and arrow shows direction in − x. b Zoom of area scan and example spatial distribution showing normalised real pressure amplitude at a frequency of 10.9 kHz, for r/a = 0.15. c Normalised real pressure Fourier amplitude at 10.9 kHz evaluated along scan line. d Corresponding time-averaged absolute pressure field area scan, highlighting localisation to the array; the decay due to radiative loss evident in (c, d) with beating in amplitude occurring due to interference with source (that decays with distance as expected).
