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Geometric characteristics and -6dB focal pressure beamwidths for the three transducers used in the study.
| Center Frequency (kHz) | Aperture (mm) | Focal Length (mm) | Axial Beamwidth (mm) | Lateral Beamwidth (mm) |
|---|---|---|---|---|
| 170 | 80 | 54 | 32.4 | 7.6 |
| 285 | 100 | 75 | 42.0 | 5.6 |
| 800 | 147 | 140 | 17.0 | 2.6 |
