In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 118, No. 3_Supplement ( 2005-09-01), p. 2042-2042
Abstract:
Nonlinear acoustic responses of water-saturated sediments are very important to understand nonlinear phenomena of gassy ocean sediments. Especially, the second harmonic, the sum, and the difference frequency acoustic waves in water-saturated sediments can provide practical criteria to estimate the nonlinear parameters of gassy sediments. In this paper, the difference frequency acoustic waves in water-saturated sandy and muddy sediments were observed in a water tank experiment using a pulse transmission technique. Their pressure levels were 10 dB higher than the background noise level at a maximum driving pressure of source acoustic transducer. The experimental results were compared with theoretical estimations of the parametric acoustic array. The nonlinear parameters of water-saturated sandy and muddy sediments were estimated as a few tens in their comparison. The nonlinear parameters were also compared with those obtained with the second harmonic acoustic wave. [Work supported by MOCIE (Ministry of Commerce, Industry and Energy).]
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2005
detail.hit.zdb_id:
1461063-2
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