Phase conjugation for measuring ultrasound absorption in inhomogeneous media

Experimental results on the use of the ultrasound phase conjugation (PC) for measuring the coefficient of sound absorption in test objects simulating an inhomogeneous medium are reported. The objects were made of gelatin with local inclusions in the form of air bubbles. The results obtained at 5 MHz...

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Bibliographic Details
Published in:Physics of wave phenomena 2010-06, Vol.18 (2), p.143-146
Main Authors: Brysev, A. P., Bunkin, F. V., Krutyansky, L. M., Smagin, N. V.
Format: Article
Language:English
Subjects:
Acoustics
Nonlinear and Parametric Ultrasonics
Physics
Physics and Astronomy
Quantum Optics
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Summary:Experimental results on the use of the ultrasound phase conjugation (PC) for measuring the coefficient of sound absorption in test objects simulating an inhomogeneous medium are reported. The objects were made of gelatin with local inclusions in the form of air bubbles. The results obtained at 5 MHz by the conventional insert/substitution method were compared with measurements by the modification of the method that employs PC of ultrasound. It is shown that the PC compensation for the distortions of the probing ultrasound beam in an inhomogeneous medium leads to a decrease in the measured ultrasound attenuation and thus allows a more accurate description of the sound absorption coefficient than the conventional method without compensation.
ISSN:1541-308X
1934-807X
DOI:10.3103/S1541308X1002007X