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Amplitude modulation of sound by sound in water-saturated river sand

Amplitude modulation of sound by sound in water-saturated river sand Abstract We present a description and the results of a laboratory experiment on observing amplitude modulation of a weak continuous high-frequency wave under the action of a sequence of strong low-frequency pulses in a statically loaded grainy medium—water-saturated river sand. We present characteristic oscillograms of the obtained acoustic signals, testifying to the manifestation of dissipative nonlinearity of river sand; as well, we observed both the effect of damping and gain of sound by sound. In the first case, this is connected with an increase in the dissipation of the medium under the action of a powerful low-frequency pulse, and in the second case, with its decrease. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acoustical Physics Springer Journals

Amplitude modulation of sound by sound in water-saturated river sand

Nazarov, V. E.; Radostin, A. V.
Acoustical Physics , Volume 57 (5): 4 – Sep 1, 2011
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References (3)

Publisher
Springer Journals
Copyright
2011 Pleiades Publishing, Ltd.
ISSN
1063-7710
eISSN
1562-6865
DOI
10.1134/s1063771011040178
Publisher site
See Article on Publisher Site

Abstract

Abstract We present a description and the results of a laboratory experiment on observing amplitude modulation of a weak continuous high-frequency wave under the action of a sequence of strong low-frequency pulses in a statically loaded grainy medium—water-saturated river sand. We present characteristic oscillograms of the obtained acoustic signals, testifying to the manifestation of dissipative nonlinearity of river sand; as well, we observed both the effect of damping and gain of sound by sound. In the first case, this is connected with an increase in the dissipation of the medium under the action of a powerful low-frequency pulse, and in the second case, with its decrease.

Journal

Acoustical Physics – Springer Journals

Published: Sep 1, 2011

Keywords: Acoustics

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