Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

Volumes:
Volumen 47, 2020 Volumen 46, 2019 Volumen 45, 2018 Volumen 44, 2017 Volumen 43, 2016 Volumen 42, 2015 Volumen 41, 2014 Volumen 40, 2013 Volumen 39, 2012 Volumen 38, 2011 Volumen 37, 2010 Volumen 36, 2009 Volumen 35, 2008 Volumen 34, 2007 Volumen 33, 2006 Volumen 32, 2005 Volumen 31, 2004 Volumen 30, 2003 Volumen 29, 2002 Volumen 28, 2001 Volumen 27, 2000 Volumen 26, 1999 Volumen 25, 1998 Volumen 24, 1997 Volumen 23, 1996 Volumen 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v28.i3.20
17 pages

Sound Propagation in Human Bronchial Tree. Part I. Theory

I. V. Vovk
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
O. I. Vovk
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine

ABSTRAKT

Analysis of geometric, physical and wave parameters of a bronchial tree and its elements has been conducted. It is shown that in frequency range up to 1000 Hz all geometric parameters of airways (except the length of trachea) are sufficiently smaller than the wavelength of the sound, which propagates inside a bronchial tree. It is established that jump of a section in the point of articulation of adjacent airways can significantly affect the sound propagation in a bronchial tree. At the same time, bifurcation of the airways has almost no impact on this process. Acoustical and mathematical models of the airways (taking into account compliance of their walls) and of parts of articulation between them are stated. Corresponding boundary problems for the Helmholtz equation are solved. Obtained results allowed us to develop an algorithm for general solving for the problem of wave propagation in the bronchial tree.


Articles with similar content:

Isotropic Bragg Light Diffraction at Acoustic Waves at Large Angles of Incidence
Telecommunications and Radio Engineering, Vol.65, 2006, issue 6-10
I. A. Klyuchikov
Fresnel Formulae in the Time Domain
Telecommunications and Radio Engineering, Vol.59, 2003, issue 7-9
A. G. Nerukh
RESONANCE SYSTEM FOR ANALYZING CYLINDRICAL SAMPLES IN MILLIMETER WAVE BAND
Telecommunications and Radio Engineering, Vol.71, 2012, issue 14
I. K. Kuzmichev, A. Yu. Popkov
Sound Propagation in Human Bronchial Tree. Part II. Analysis of Numerical Results
International Journal of Fluid Mechanics Research, Vol.28, 2001, issue 3
V. G. Basovsky, I. V. Vovk, O. I. Vovk
Axially-Symmetric Eigen Modes of Electric-Type in the Open Resonator with Spherical Mirrors
Telecommunications and Radio Engineering, Vol.65, 2006, issue 6-10
Yu. V. Svishchov