Figure 6

Flow chart of add-in code to calculate simulated AE characteristics. The simulated AE signal is represented by the normal velocity component V(i), which is imported into three calculation modules to obtain the event, energy and b-value, where i is the step rather than time, iL is the last threshold crossing step, d is the signal duration, HDT is the hit definition time, HLT is the hit lockout time, E(i) is the AE energy, m is the particle mass, M(i) is the magnitude, ∆m is the magnitude interval, j is the number of AE windows, and N is the number of simulated magnitudes that exceed (M + ∆m).