ENERGY CLASSIFICATION OF ACOUSTIC EVENTS USING THE CODA OF A SIGNAL
1 Moscow State University
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
3 ISTERRE, CNRS, Université Grenoble-Alpes
4 The Borok Geophysical Observatory branch, Schmidt Institute of the Physics of the Earth, Russian Academy of Sciences
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
3 ISTERRE, CNRS, Université Grenoble-Alpes
4 The Borok Geophysical Observatory branch, Schmidt Institute of the Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 57
Number: 3
Year: 2021
Pages: 29-40
UDK: 550.34+620.179
DOI: 10.21455/si2021.3-3
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KARTSEVA T.I., SHAPIRO N.M., PATONIN A.V., SMIRNOV V.B., PONOMAREV A.V. ENERGY CLASSIFICATION OF ACOUSTIC EVENTS USING THE CODA OF A SIGNAL // . 2021. Т. 57. № 3. С. 29-40. DOI: 10.21455/si2021.3-3
@article{KARTSEVAENERGY2021,
author = "KARTSEVA, T. I. and SHAPIRO, N. M. and PATONIN, A. V. and SMIRNOV, V. B. and PONOMAREV, A. V.",
title = "ENERGY CLASSIFICATION OF ACOUSTIC EVENTS USING THE CODA OF A SIGNAL",
journal = "Seismic instruments",
year = 2021,
volume = "57",
number = "3",
pages = "29-40",
doi = "10.21455/si2021.3-3",
language = "English"
}
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Keywords: acoustic emission, rock physics, coda of a signal, energy classification
Аnnotation: A new method of energy classification of acoustic events recorded in laboratory experiments on rock destruction is proposed. The method is based on the analysis of the coda-waves of acoustic emission events. Coda-waves are considered as the reverberation of the acoustic field in the test sample. The new classification was tested on two experiments carried out on different rocks: granites of the Voronezh massif and Berea sandstone, on a controlled hydraulic press INOVA-1000 of the Geophysical Observatory “Borok”, IPE RAS. Comparison of the new classification with the one used in GO “Borok” showed that both methods give well consistent results in the middle range of energies of AE events. For strong events with saturated initial parts of the signals because of limitations of the recording equipment, the new technique showed better results leading to energy estimates of such events from the undistorted coda of the signal.