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- W2784688649 abstract "This experimental study investigates the underground sound generated by different kinds of rock motions occurring in debris flows. The experiments were divided into two parts. The first part consisted in measuring the main characteristics of the underground sound caused by friction of a rock rubbed against a bed of gravel, and that caused by a free-falling rock hitting a similar bed of gravel. In the second part, a hydrophone was installed at the bottom of a laboratory channel to measure the underground sound of debris flows in that channel. The sound signals were analyzed using both the fast Fourier transform and the Gabor transform to represent the signals in the frequency and time-frequency domain. The measurement results reveal that the frequency of the sound generated by the rock-gravel bed friction is relatively low, being mostly between 20 and 80 Hz. In contrast, the frequency range of the collision sound is relatively higher, between 10 and 500 Hz. Finally, the frequency of the underground sound caused by the debris flows in the flume is in the range of 20-300 Hz. 743 Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Rickenmann & Chen (eds) © 2003 Millpress, Rotterdam, ISBN 90 77017 78 X" @default.
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- W2784688649 date "2003-12-01" @default.
- W2784688649 modified "2023-09-25" @default.
- W2784688649 title "Experimental study of the underground sound generated by debris flows" @default.
- W2784688649 hasPublicationYear "2003" @default.
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