Low frequency resonant dispersion of sound in bubble media |
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Authors: | V S Fedotovskii and T N Vereshchagina |
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Institution: | 1.Leipunski Institute for Physics and Power Engineering,Obninsk,Russia |
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Abstract: | Presented is a theory of a new type of resonant dispersion of sound in a gas-liquid bubble media based on the use of effective
dynamic density. We show that because of spheroidal-translational oscillations of the bubbles the dynamic density of the gas-liquid
media has a resonance dependence on the frequency, which is manifested in wave process as a low-frequency resonant dispersion
of sound. This dispersion is significantly different from the known high-frequency resonant dispersion, which is due to resonance
in the volume oscillations of the bubbles. The results of the experiments confirming the existence of the resonant dispersion
of sound at a frequency equal to half the natural frequency of the spheroidal oscillations of bubbles are provided. |
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