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This paper reports the results of measurements of the attenuation and velocity of ultrasonic waves in various liquid media as a function of the intensity level at the detector of the radiation. The attenuation in distilled water and dilute solutions of acetic acid and sodium acetate is found to increase almost linearly with the acoustic excess pressure amplitude in the range from 2 to 7 atmospheres, for frequencies of 4, 5, 7, and 9 megacycles/sec. The attenuation in glycerine shows a similar increase when correction is made for the unavoidable rise in temperature of the medium. The rate of increase is found to be practically independent of frequency in the range employed, thus disagreeing with the prediction of R. D. Fay's theory of the attenuation of high-amplitude plane waves. No change of velocity with source intensity has been observed. [ABSTRACT FROM AUTHOR]

Measurements have been made which show a dependence of attenuation of ultrasonic waves in several liquid media upon the intensity level at the source of the radiation. Measurements of the velocity showed no observable change at high intensities. The attenuation for distilled water and dilute solutions of acetic acid and sodium acetate was found to increase almost linearly with the acoustic pressure amplitude in the interval from 2 to 7 atmospheres. The attenuation in glycerol showed a similar increase when an unavoidable rise in the temperature of the medium was taken into account. Graphs of data taken at 4, 5, 7 and 9 megacycles/sec will be given and theories of the increase in attenuation will be discussed. [ABSTRACT FROM AUTHOR]