Same as Fig. 18 except that a 60 per cent cosine taper w(t) of total duration t₂−t₁=35 s has been used to weight preferentially the early-arriving portions of the perturbed and the shifted, unperturbed waveforms p_het(r, t) and p_hom(r, t−δT_ccm^φ=0) in eq. (41). Horizontal axis in bottom two plots is reduced time, t−L/c. The resulting R=30λ traveltime measurements δT_ccm^φ=0=−2.34 s (fast anomaly, left) and δT_ccm^φ=0=+2.19 s (slow anomaly, right) are in much better agreement with the predictions δT_bdk^φ=0 of banana–doughnut theory.