The paper contains a detailed description of pulse equipment which has been built and used for measuring ultrasonic absorption in liquids. The apparatus automatically produces a paper recording from which the absorption coefficient is easily calculated. Absorption data for 17 aqueous solutions and 2 non-aqueous solutions are given. Measurements made with this apparatus and a high frequency apparatus extending to 200 Mc/s have been analysed in terms of single and double relaxation processes and the resulting parameters A, B and f c are tabulated.
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Edmonds et al. (1962) studied this question.
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