Histogram of resonance frequency distribution in the group of influence and control for different phases of respiration (according to abscise axisresonance frequency f₀, according to axis of ordinatesthe amount of observations; diagonal ruling from left to right, upwardthe regimen of inhalation, diagonal ruling right to left, upwardregimen of exhalation, horizontal hatchingregimen of free respiration; solid line of density of probability corresponds with inhalation, dotted line corresponds with the exhalation, dotted linefree respiration).