Figure 6.

Two patterns collected from two volunteers simulating tachypnea. In blue, the reference signal $\widehat{r}\left(t\right)$, in orange the $\widehat{v}\left(f\right)$ signal. In the first volunteer (graphs A), the average ${\widehat{f}}_R$ is 39.14 bpm while the average $f_R$ is 39.34 bpm. In the second volunteer (graphs B), the average ${\widehat{f}}_R$ is 46.44 bpm while the average $f_R$ is 46.28 bpm.