Figure 16 shows the linear fit and the region used for the 2nd harmonic.
Figure 17 shows the extrapolated decay for the 2nd harmonic.
Figure 18 shows the linear fit and the region used for the 3rd harmonic.
Figure 19 shows the extrapolated decay for the 3rd harmonic.
Figure 20 shows the linear fit and the region used at 3628Hz.
Figure 21 shows the extrapolated decay at 3628Hz.
Figure 22 shows the linear fit and the region used at 12527Hz.
Figure 23 shows the extrapolated decay at 12527Hz.
Figure 24 shows the linear fit and the region used at 21759Hz.
Figure 25 shows the extrapolated decay at 21759Hz.