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Information × Registration Number 0221U101027, 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 12-01-2021 Organization The Institute of Hydromechanics of the National Academy of Sciences of Ukraine popup.description2 The object of study - breathing sounds, heart sounds, chest, trachea, main bronchi. The purpose of the work is to build a general model of the interaction of the cardiovascular and respiratory systems on the basis of a comprehensive study of normal bronchial and vesicular noise and to build an acoustic model of the chest. Research methods - study of respiratory and cardiovascular noise on the basis of clinical studies using computer phonospirography, as well as theoretical and numerical modeling of the process of sound propagation in the human chest.  A statistical relationship between the sounds of vesicular and bronchial respiration of healthy people using 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 method of cyclostationarity to the analysis of auscultatory phonograms, which may contain respiratory and cardiac components, is substantiated. It is shown that for complex signals that contain superimposed sounds of heart and breath, cyclic frequencies characteristic of the heart rate and the cycle of inhalation / exhalation are detected simultaneously, and in some cases - additional components associated with the duration of the phases of inspiration and exhale separately. Using the theory of bending oscillations of annular open rods, a calculation scheme for quantitative estimation of forced oscillations of tracheal and bronchial cartilages in the composition of the corresponding airways has been developed. It has been studied how the oscillations of these cartilages affect the acoustic properties of the human trachea and main bronchi. An improved acoustic model of the human trachea and main bronchi has been constructed, which allows to take more fully into account the relevant transfer functions to study the patterns of sound transmission from the main human airways to the outer surface of the chest. Product Description popup.authors popup.nrat_date 2021-01-12 Close