Figure 7
Flow chart: the way to compute BF.A flow chart to estimate BF by obtaining F-APW × PCG−1 from F-APW and PCG. Front CAB and Front CAS waveforms can be extracted from F-APW using the obtained BF. While F-APW × PCG−1 indicates the frequency analysis result of F-APW divided by the frequency analysis result of PCG, it also means that the frequency analysis waveform of PCG subtracts from the frequency analysis waveform of F-APW on a logarithmic axis. A cliff part appears in the differential waveform shown in drawing (6) of Fig. 7, and is considered to be BF.
