Attenuation and dispersion of sound by an aerosol, composed of oleic acid and a nitrogen carrier gas, are measured with an acoustic interferometer. Mean particle size and concentration are measured in situ by spectrophotometric tests. The measurements of attenuation and dispersion show good agreement with the theory in the range of ω(τd)32 covered, where ω is circular frequency and (τd)32, is dynamic relaxation time of the particles. In particular, the maximum attenuation per wavelength and the maximum dispersion, which are predicted by the theory, are confirmed experimentally.
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Temkin et al. (1966) studied this question.
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