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. Author manuscript; available in PMC: 2007 Sep 27.
Published in final edited form as: J Acoust Soc Am. 2006 Jun;119(6):3625–3636. doi: 10.1121/1.2195074

FIG. 4.

FIG. 4

(a) The pressure wave form produced by the electrode spark discharge of HM-3 lithotripter at 20 kV at about 24 mm away from F1. The dashed line is the fitted curve in an exponential decay format and (b) the pressure amplitude is found to be inversely proportional to the propagation distance at both 20 and 22 kV.