Fig. 3
From: Stimulation of osteoblast differentiation with guided ultrasound waves
a A 1kHz drive signal with 20 % duty cycle plotted with the hydrophone recording from the chamber slide on the borosilicate plate. The asterisk indicates that the S 0 and A 0 modes are mixed since each transducer pulse will create both modes which have different SOS. b The first arrival can be used to compute the SOS in order to verify the presence of Lamb waves. In this case, over 75 mm, a SOS of 4900 m/s is determined which corresponds to the lowest order symmetrical Lamb mode (S 0)