Abstract
It is well known that measurements of the absorption of ultrasonic waves in liquids1–3 often do not show good agreement, and that for numerous liquids they indicate absorption coefficients many times those calculated on the assumption of a purely viscous loss. Because of these discrepancies it was considered useful to make measurements by a new technique, and one was chosen which would remove many of the possible objections to previous methods. A ‘radar pulse’ technique was developed, in which a short wave-train was emitted in a narrow pencil from a quartz oscillator; the sound, after travelling through the liquid, was reflected and received by the same quartz plate, which thus acted as a common ‘transmit–receive’ transducer.
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References
References to earlier work can be found in Richards, W. T., Rev. Mod. Phys. 11, 36 (1939).
Fox, F. E., and Rock, G. D., J. Acoust. Soc. Amer., 12, 505 (1941); Phys. Rev., 70, 68(1946).
Teeter, C. E., J. Acoust. Soc. Amer., 18, 488 (1946).
Born, H., Z. Phys., 120, 383 (1942â43).
Stokes, G. G., Trans. Camb. Phil. Soc., 8, 287 (1845).
Pellam, J. R., and Galt, J. K., J. Chem. Phys., 14, 608 (1946).
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PINKERTON, J. A Pulse Method for the Measurement of Ultrasonic Absorption in Liquids: Results for Water. Nature 160, 128–129 (1947). https://doi.org/10.1038/160128b0
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DOI: https://doi.org/10.1038/160128b0
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