V.N.Oliynik Estimating the effect of a statistical distribution of alveolar dimensions on sound dissipation in lungs |
Acoustic bulletin, Vol. 16 ¹ 4, (2013-2014) |
| A level of sound attenuation depending on the statistical distribution of the alveolar dimensions is determined on the basis of the theory of heat dissipation in the bubble media. To approximate the size distribution of the real alveoli when calculating the acoustic damping coefficient, the continuously even and step distribution laws are used. The allowable width of the even approximation interval keeping the accuracy of the estimate is determined. Evaluation of the attenuation coefficient for the step distribution of the alveolar sizes shows that this coefficient can be approximated with a sufficient accuracy by the value calculated for the equivalent medium with the similar alveoli. The obtained result occurred to be quite sensitive to calculation errors in determining the average linear size of the alveoli. |
|
KEY WORDS: alveole, bubble medium, acoustic dissipation, typical dimension, the distribution density |
| TEXT LANGUAGE: Ukrainian |