Diffraction effects for acoustic beams propagating through a parabolic and uniform flow

Open Access

Figure 2.

Sound pressure field ( $| q_{_{L}} | / (ρ_{0} c {\bar{v}}_{s})$ $Mathematical equation: $ |q_{_L}| / \left(\rho_0 c \bar{v}_s \right) $$ ) at no-flow conditions (v _avg = 0 m/s) when (a) f = 150 kHz (ka = 23.6) and (b) f = 500 kHz (ka = 78.5) The no-flow acoustic axis and the dominant acoustic path of the sound field (Eqs. (14) and (16)) are indicated by the red and white vertical dashed lines, respectively.

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