I.V.Vovk, V.T.Matsypura Modeling the mechanism of generation of vesicular respiratory sounds |
Acoustic bulletin, Vol. 17 ¹ 1, (2015) |
| A mathematical model of the mechanism of generation of vesicular respiratory sounds is proposed on the base of assumption about the significant contribution of vibrations of the alveolar walls. The walls of the alveoli are presented in the form of membranes. It is shown that under their periodic stretching, the transverse vibrations of the membranes cause the acoustic vibrations in the parenchyma. The characteristics of the composite noise signal formed at simultaneous excitation of the representative ensemble of membranes with different geometric and mechanical characteristics are determined. The analysis of the signal evidences that its shape, spectrum and fractal properties are close enough to the form, spectrum and fractal properties of real vesicular noise. |
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KEY WORDS: vesicular respiratory sounds, alveolar walls, membrane, transverse vibrations, fractal analysis |
| TEXT LANGUAGE: Russian |