Textronics System for Breathing Measurement

The human organism needs oxygen for life. It is taken from air in the breathing process. This is rhythmical and people are unaware of this. A very important problem in breathing frequency measurement is knowledge of human physiology. During the respiratory cycle, the volume of the chest changes. This is the result of growing larger in three dimensions: anteroposterior, transverse and perpendicular. Exhalation is the passive phase in a correct breathing cycle. In a healthy human we can observe during the respiration process under rest conditions 14 18 breathing cycles per minute, which is equivalent to 8 litres of air. Every breath is equivalent to 350 500 ml of air, and it is called respiratory air, and this process is termed one-minute lung ventilation. The number of breaths changes during the workings of the organism, and could be several times greater than ventilation at rest [1, 2].