Abstract
An acoustooptic method for determining the velocities of longitudinal ultrasonic waves in a 105 to 108-Hz range in strongly absorbing (scattering) materials, when methods based on the sound transmission through a sample are unfit, is described. This method employs the acoustooptic determination of the acoustic impedance of the studied sample by measuring the reflection coefficient from the boundary between two contacting substances, namely, a liquid with the known (or measured) acoustic impedance and the studied solid sample. The method features the following advantages: (i) it is acceptable, when standard methods do not work due to the sound attenuation (scattering); (ii) there is no need for exact knowledge of sample sizes, the operating frequency, and the electromechanical coupling factor, and also for using reference samples; and (iii) the sound attenuation in a liquid and the distance from the sample surface to measurement points (required for calculations of the sound velocity) are easily measured. In this case, the velocity measurement error is usually 5–10%.
Similar content being viewed by others
References
Truell, R., Elbaum, C., and Chick, B.B., Ultrasonic Methods in Solid State Physics, New York: Academic, 1969. Translated under the title Ul’trazvukovye metody v fizike tverdogo tela, Moscow: Mir, 1972, pp. 45–122.
Physical Acoustics: Principles and Methods, Mason, W.P., Ed., New York: Academic, 1968. Translated under the title Physical Acoustics, Moscow: Mir, 1966, vol. 1, part A, pp. 329–331.
Bogdanov, S.V., Zubrinov, I.I., Pestryakov, E.V., and Sapozhnikov, V.K., Akust. Zh., 2000, vol. 46, no. 1, p. 35 [Acoust. Phys. (Engl. Transl.), vol. 46, no. 1, p. 27].
Bogdanov, S.V. and Sapozhnikov, V.K., Elektromagn. Volny Elektron. Sist., 2006, vol. 11, no. 10, p. 62.
Kaye, G.W.C. and Laby, T.H., Tables of Physical and Chemical Constants and Some Mathematical Functions, 16th ed., New York: Longman, 1995. Translated under the title Tablitsy fizicheskikh i khimicheskikh postoyannykh, Moscow: Fizmatgiz, 1962.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © S.V. Bogdanov, V.K. Sapozhnikov, 2008, published in Pribory i Tekhnika Eksperimenta, 2008, No. 4, pp. 145–149.
Rights and permissions
About this article
Cite this article
Bogdanov, S.V., Sapozhnikov, V.K. An acoustooptic method for sound velocity measurements in strongly sound-absorbing materials. Instrum Exp Tech 51, 625–629 (2008). https://doi.org/10.1134/S0020441208040210
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0020441208040210