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. Author manuscript; available in PMC: 2009 Jul 29.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Dec;55(12):2683–2691. doi: 10.1109/TUFFC.2008.983

Fig. 3.

Fig. 3

Transmit characteristic of the 40 MHz single element source transducer: (a) a measured waveform by a hydrophone at the focal depth of the source transducer (z = 12 mm); (b) its spectrum (at z = 12 mm), the attenuation curve vs. frequency in the water at the distance of 30 mm (attenuation), and the attenuated spectrum at the surface of receive element, z = 42 mm (at z = 42 mm).