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. 2015 Aug 17;5:13063. doi: 10.1038/srep13063

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The amplitude of the pressure field (color) and the corresponding time-averaged Poynting vector S (arrow) for the acoustic HB beams with (a) α = 6 and (b) α = 30, where the length and orientation of the arrow indicate the magnitude and direction of S, respectively. The insets exhibit and evaluated at y = 0, normalized by the corresponding maxima.

Inline graphic — The amplitude of the pressure field (color) and the corresponding time-averaged Poynting vector S (arrow) for the acoustic HB beams with (a) α = 6 and (b) α = 30, where the length and orientation of the arrow indicate the magnitude and direction of S, respectively. The insets exhibit and evaluated at y = 0, normalized by the corresponding maxima.