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Figure 2


Fig. 2. Build-up and decay phase of vibratory pulses. The first 15 and the last 15 cycles of a vibratory pulse (A) were analysed regarding cycle amplitude (B) and cycle frequency (C). Line-plots, left y-axis: absolute values for velocity (V) and cycle frequency (Cycle freq.). Open circles, right y-axis: relative values (percentage of maximum of velocity Vp-p, and main frequency MF, respectively). Arrows indicate the cycle numbers where the 95% threshold of build-up and decay is attained. Size of gap: 0–600 cycles.