Figure 13.

Analysis of the variation of $v_{\mathrm{c}}$ from 2000 to $14,160$ mm/s, with $t_{\mathrm{cv}}$ = $6\times {10}^{-5}$ s: (a) the signal ${\overline{\sigma }}_1$ at the input face; and (b) the respective signal ${\overline{\sigma }}_2$ at the output face.