Search academic texts

Registration Number

0222U000046, 0120U000092 , R & D reports

Title

Identification of characteristics of sounds of human activity as a basis for the development of algorithms for the diagnosis of the disease

popup.stage_title

Head

Grinchenko Viktor T.,

Registration Date

02-01-2022

Organization

The Institute of Hydromechanics of the National Academy of Sciences of Ukraine

popup.description2

The statistical correlation between the sounds of vesicular and bronchial respiration of healthy people was established with the help of computer phonospirography. The obtained results are the basis for the analysis of human breathing sounds in the case of diseases of the bronchopulmonary system. The expediency of applying the cyclostationarity method to the analysis of auscultatory phonograms, which may contain respiratory and cardiological components, is substantiated. It is shown that for complex signals containing superimposed sounds of heart and breath, cyclic frequencies characteristic of heart rate and inhale / exhale cycle are detected at the same time, and in some cases - additional components associated with the duration of the inhale and exhale phases. separately. The regularities of regular and chaotic modes of interaction of the cardiovascular and respiratory systems have been studied, taking into account the reverse actions of the cardiovascular system on the parameters of respiratory oscillations for different values of the human pulse. It is established that the irregularity of the behavior of phase trajectories depends on the intensity of the effect of heart rate on respiration, which is characteristic of the dynamics of the cardiorespiratory system of a healthy person. Using the theory of bending oscillations of annular open rods, a calculation scheme was developed for the quantitative estimation of forced oscillations of tracheal and bronchial cartilages in the composition of the corresponding airways. An improved acoustic model of the human trachea and main bronchi has been constructed, which allows to take more fully into account the relevant transmission functions to study the laws of sound transmission from the main human airways to the outer surface of the thorax.

Product Description

popup.authors

Vovk Igor V
Grinchenko Victor T
Konovalyuk Tetyana P
Krasnopolska Tatiana S
Malyuha Vladimir S
Pechuk Eugene D
Sidko Maria I