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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v31.i2.60
14 pages

Effect of Physiological Features of Upper Airways on the Respiratory Sounds Characteristics

I. V. Vovk
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
S. L. Dakhnov
Central Military Clinical Hospital of the Ministry of Defense of Ukraine, Kyiv, Ukraine


Some physiological features of human respiratory tract important for establishing the adequate knowledge about the sources of the respiratory sounds are discussed. The understanding of peculiarities of such sound generation is necessary for creation of efficient computer systems for breath noise recording and processing intended for improvement of the respiratory diseases diagnostics. An essential multiparametric dependence of the respiratory sounds predetermines the necessity to document all these parameters in the process of measurements. One of the common parameters usually recorded in the process of measurement is the airflow rate measured with a pneumotachograph. On the basis of measuring the spread for the true glottis dimensions and estimation of the corresponding level of the respiration noise power spectrum we have shown that maintenance of predetermined airflow rate in different patients does not guarantee the same power levels of the respiratory sounds generated by airflow in the trachea.