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. Author manuscript; available in PMC: 2020 Jul 20.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2016 Feb 18;63(5):671–682. doi: 10.1109/TUFFC.2016.2531504

Fig. 4.

Fig. 4.

Direct measurements of the pressure waveforms at the transducer focus in the free field and through the three skullcaps using a fiber optic hydrophone.