Broadband acoustic focusing by symmetric Airy beams with phased arrays comprised of different numbers of cavity structures
(color online) Spatial distributions of intensity field for Airy beams with parameter (a) θ = 0.3°, (b) 0.4°, and (c) 0.6°, and induced by acoustic lenses with parameter (d) θ = 0.3°, (e) 0.4°, and (f) 0.6° at 7.95 kHz.
