The propagation of sound in a binary liquid mixture

Measurements are made in mixtures of aniline and cyclohexane at various concentrations and temperatures in the vicinity of the solution point of the velocity and attenuation of ultrasonic pulses. It appears that the large values of the attenuation observed in this region are due to the scattering of the radiation, which has been measured as to its angular distribution at various frequencies. Evidence from the extinction and directionality of sound signals in the mixture shows that the scattering is due to biphasal clusters which exist in the neighbourhood of the solution point and which are not set up by the passage of the sound itself. There remains some absorption which is of a molecular (viscous) nature.