1997
DOI: 10.1121/1.419374
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Observations on attenuation and shear-wave velocity in fine-grained, marine sediments

Abstract: Compressional(P)-wave attenuation, shear(S)-wave attenuation, and shear(S)-wave velocity measurements, compiled for fine-grained, unconsolidated sediments, show trends that do not support empirical relationships [Hamilton, J. Acoust. Soc. Am. 68, 1313–1340 (1980); in Acoustics and Ocean Bottom (F. A. S. E. Specialize Conf., Madrid, 1987)] commonly used for geoacoustic modeling. The exception is compressional-wave attenuation data, from 10 Hz to 500 kHz, that essentially follow a frequency dependence of f1 (±2 … Show more

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Cited by 74 publications
(37 citation statements)
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“…We are not, however, convinced that dispersion, as predicted by Biot^Stoll models (e.g., Yamamoto and Turgut, 1988;Leurer, 1997) and concluded from data presented by others (Stoll, 1989;Kibblewhite, 1989;Bowles, 1997;Ba⁄, 1999) produces di¡erences of the observed magnitude in Eel margin sediments. While attenuation is much more di⁄cult to measure than sound speed because of its sensitivity to noise and transducer response, these limitations should not produce the distinct di¡erences that we see in our data.…”
Section: Attenuationmentioning
confidence: 60%
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“…We are not, however, convinced that dispersion, as predicted by Biot^Stoll models (e.g., Yamamoto and Turgut, 1988;Leurer, 1997) and concluded from data presented by others (Stoll, 1989;Kibblewhite, 1989;Bowles, 1997;Ba⁄, 1999) produces di¡erences of the observed magnitude in Eel margin sediments. While attenuation is much more di⁄cult to measure than sound speed because of its sensitivity to noise and transducer response, these limitations should not produce the distinct di¡erences that we see in our data.…”
Section: Attenuationmentioning
confidence: 60%
“…The dispersive behavior of elastic wave propagation through porous media was theoretically predicted (Biot, 1956a,b;Kjartansson, 1979), and reported for sound speed in sandy sediments (Barbagelata et al, 1991;Fu, 1998). Other researchers doubt the existence of dispersion in marine sediments or argue that the e¡ect may be so small over a wide frequency band that it can be neglected (Hamilton, 1972;Kibblewhite, 1989;Bowles, 1997;Buckingham, 1997).…”
Section: Di¡erences Between In Situ Acoustic and Laboratory Ultrasonimentioning
confidence: 99%
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“…Observations from the Sediment Acoustics Experiment of 1999 ͑SAX99͒ ͑Thorsos et al, 2001͒ and the crosshole tomography experiments of Turgut and Yamamoto ͑1990͒ are generally in agreement with the Biot-Stoll model ͑see Buchanan, 2006͒. However, the near-linear scaling of compressional-wave attenuation with frequency and logarithmic velocity dispersion of the G-S model conforms better with the SAX99 data above 10 kHz. The G-S model also relates better to other observations in a range of sediments within low-frequency seismic surveys and high-frequency laboratory studies ͑e.g., Hamilton, 1972;Bowles, 1997;Simpson and Houston, 2000;Williams et al, 2002;Simpson et al, 2003͒. The G-S theory suggests that intrinsic attenuation is independent of viscous flow parameters such as permeability, tortuosity, and the structure factor and is governed instead by grain size, porosity, and overburden pressure.…”
Section: Introductionmentioning
confidence: 99%
“…The value of p is frequently reported as representing a linear model of attenuation (e.g. Wood and Weston [34], and Bowles [35]). …”
Section: Introductionmentioning
confidence: 99%