TABLE I.

Experimental holography parameters.

	Transducer from Fig. 3
	(a)	(b)	(c)
Frequency (MHz)	2.2	1	2.3
Transducer aperture (mm)	45	147	$49.9\times 13.5$
Focal distance (mm)	45	140	53
$z_{\mathrm{h}}$ (mm)	30	85	38
Measurement aperture $2a_{\mathrm{h}}$ (mm)	30 × 30	120 × 120	$199.5\times 40.6$
step size (mm)	0.30	0.75	0.35
No. scan points	10 201	25 921	66 807
No. excitation cycles	120	60	160
Time window (μs)	42–44	104–114	88–98
Hydrophone size $2a_0$ (mm)	0.15	0.2	0.2
ρ0 (kg/m3)	997	998	998
c0 (m/s)	1496	1485	1485
Source surface aperture (mm)	$58.8\times 58.8$	$176.8\times 176.8$	$62.8\times 26.4$
Source step size (mm)	0.2	0.4	0.2