Biomedical Engineering Reference
In-Depth Information
Fig. 9.14
Impedance in its complex representation and its equivalent Bode plot for healthy
group #3. The
stars
denote estimated impedance using (
3.8
), while a
continuous line
denotes the
averaged values
9.5.3 Non-linear Distortions at Low Frequencies
Similar to the measurements described previously in this chapter, the available infor-
mation allows us to calculate the index from (
9.26
) in order to quantify the amount
of non-linear distortions coming from the airways and lung tissue. The results are
given in Fig.
9.24
for the healthy groups and in Fig.
9.25
for the diagnosed groups,
by means of boxplots. In both cases, statistically significant differences have been
