V.N.Oliynik On matching of theoretical approaches to determining of sound attenuation decrement in pulmonary parenchyma |
Acoustic bulletin, Vol. 15 ¹ 4, (2012) |
| The paper deals with comparative analysis of two models of formation of thermal sound attenuation in pulmonary parenchyma based on the Isakovich acoustic theory for emulsions and theory of resonance sound scattering on bubbles ensemble in a liquid. The reasons for quantitative and qualitative discrepancy between the results obtained using these approaches are revealed and physically based recommendations for adjustment of resonant bubble model are developed. This allowed the achieving of satisfactory matching of the numerical data and confirmed the adequacy of using of the model of acoustic dissipation in emulsions for parenchyma. |
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KEY WORDS: pulmonary parenchyma, attenuation decrement, thermal dissipation, emulsion, bubble medium |
| TEXT LANGUAGE: Ukrainian |