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. Author manuscript; available in PMC: 2022 Jul 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2021 Jun 29;68(7):2419–2431. doi: 10.1109/TUFFC.2021.3065952

Fig. 7.

Fig. 7.

HF pressure waveforms, and their spectra, acquired with a hydrophone from (a) the DF-HF and (b) a standard 21 MHz probe (MX250). Both transducers were driven by a Vevo3100 system using a single cycle voltage pulse at 21 MHz, and measurement performs on Tx aperture axis, at an azimuthal focus set to 11 mm below the probe surface.