Abstract
Measurements of the sound absorption coefficient in test objects containing solid microparticles randomly distributed over the object volumes are carried out. Two methods are used for this purpose: the standard echo-pulse insert-substitution method and a modified method using phase conjugation of ultrasound. The test objects are made from gelatin, and the size of the particles introduced in it is chosen to allow measurements in both the long- and medium-wavelength scattering modes of the probing beam. It is shown that, in the first scattering mode, in which the presence of particles causes additional viscous and temperature losses, the two aforementioned methods give identical results. In the second scattering mode, in which the dominant mechanism of additional loss is elastic scattering, the use of phase conjugation allows an almost complete reconstruction of the scattered field and, hence, a more reliable upper estimate for the coefficient of ultrasonic absorption in the test objects.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. C. Bamber, in Physical Principles of Medical Ultrasonics, Ed. by C. R. Hill, J. C. Bamber and G. R. ter Haar, (Wiley, United Kingdom, 2004). pp. 93–167.
P. W. Marcus and E. L. Carstensen, J. Acoust. Soc. Am. 58, 1334 (1975).
J. G. Miller, D. E. Yuhas, J. W. Mimbs, et al., Proc. IEEE Ultrasonics Symp., No. 76, 33 (1976).
J. D. Pohlhammer, C. A. Edwads, and W. D. O’Brien, Jr., Med. Phys. 8, 692 (1981).
L. A. Frizzell, E. L. Cerstensen, and D. Davis, J. Acoust. Soc. Am. 65, 1309 (1979).
N. V. Smagin, L. M. Krutyanskii, A. P. Brysev, and F. V. Bunkin, Acoust. Phys. 57, 482 (2011).
A. P. Brysev, F. V. Bunkin, L. M. Krutyansky, and N. V. Smagin, Phys. Wave Phenom. 18(2), 143 (2010).
K. Fossheim and R. L. Holt, Phys. Rev. Lett. 45, 730 (1980).
F. Dunn, P. D. Edmonds, and W. J. Fry, in Absorption and Dispersion of Ultrasound in Biological Media: Biological Engineering, Ed. by H. P. Schwan (McGraw-Hill, New York, 1969). pp. 205–332.
A. P. Brysev, F. V. Bunkin, L. M. Krutyanskii, et al., Acoust. Phys. 43, 207 (1997).
J. R. Allegra and S. A. Hawley, J. Acoust. Soc. Am. 51, 1545 (1972).
D. J. McClements, Langmuir 12, 3454 (1996).
R. E. Challis, M. J. Povey, M. L. Mather, and A. K. Holmes, Rep. Prog. Phys. 68, 1541 (2005).
I. S. Kol’tsova and I. G. Mikhailov, Akust. Zh. 21, 568 (1975).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.V. Smagin, L.M. Krutyansky, A.P. Brysev, 2013, published in Akusticheskii Zhurnal, 2013, Vol. 59, No. 2, pp. 182–185.
Rights and permissions
About this article
Cite this article
Smagin, N.V., Krutyansky, L.M. & Brysev, A.P. Sound absorption coefficient measurements by phase-conjugate ultrasonic waves. Acoust. Phys. 59, 159–162 (2013). https://doi.org/10.1134/S1063771013020115
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063771013020115