The article presents the results of applying the signal time reversal method in the ultrasound (~130 kHz) under strong spot heating conditions (>250°С) and deformation of the investigated sample—a steel plate. It is shown that the distortions of the time-reversed signal during propagation, caused by changes in the sample properties, can be significantly reduced by reducing the duration of the processed signals and by using several receivers.
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Mironov, M.A., Pyatakov, P.A. & Shulyapov, S.A. Specific Features of Applying Signal Time Reversal in a Nonstationary Waveguide. Acoust. Phys. 67, 648–652 (2021). https://doi.org/10.1134/S1063771021330046
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DOI: https://doi.org/10.1134/S1063771021330046