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. Author manuscript; available in PMC: 2019 Jan 9.
Published in final edited form as: Phys Med Biol. 2018 Jan 9;63(2):025011. doi: 10.1088/1361-6560/aa9a2f

Figure 8.

Figure 8

Plots of twinkle power versus time and absolute static pressure in MPa (dashed, right y-axis) showing the effect of hypobaric conditions on (a) COM and (b) brushite stones. (a) When pressure was reduced, the twinkle power on the macroscopically rough COM stone increased before returning to initial levels when the pressure was returned to atmosphere. (b) Twinkling on the macroscopically smooth brushite stone decreased when the pressure was reduced before returning to approximately the initial levels when the pressure was returned to atmosphere. These data were collected with the P4-2 transducer.