title: Mathematical justification of the acoustic method for measuring the impedance of the respiratory tract.
abstract: A new method for measuring a complex frequency-dependent acoustic impedance of the respiratory tract based on two-microphone method was developed. The measuring device consists of a waveguide connected through a mouthpiece to the patient's mouth. A sound field with a frequency range from 5 to 100 Hz is created in the waveguide. The impedance of the respiratory tract is determined at free respiration of the patient in the set frequency range; the duration of examination does not exceed 15 s. The criteria for the recognition of respiratory tract pathologies are proposed.
authors.affiliation: Burnazyan Federal Medical Biophysical Center, Moscow, Russia. a.v.bogomolov@gmail.com.
authors.forename: A V
authors.initials: AV
authors.lastname: Bogomolov
authors.affiliation: Burnazyan Federal Medical Biophysical Center, Moscow, Russia.
authors.forename: S P
authors.initials: SP
authors.lastname: Dragan
mesh_terms: D000388:Air; D000465:Algorithms; D001696:Biomechanical Phenomena; D006801:Humans; D008954:Models, Biological; D011312:Pressure; D012129:Respiratory Function Tests / Q000379:methods*; D012143:Respiratory Physiological Phenomena; D013016:Sound