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Titolo:
FREQUENCY-DEPENDENCE OF SEDIMENT ATTENUATION IN 2 LOW-FREQUENCY SHALLOW-WATER ACOUSTIC EXPERIMENTAL-DATA SETS
Autore:
EVANS RB; CAREY WM;
Indirizzi:
SAIC NEW LONDON CT 06320 KERDY GRP LLC OLD LYME CT 06371 NUWC NEWPORT RI 02841
Titolo Testata:
IEEE journal of oceanic engineering
fascicolo: 4, volume: 23, anno: 1998,
pagine: 439 - 447
SICI:
0364-9059(1998)23:4<439:FOSAI2>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
COEFFICIENTS; PROPAGATION; PARAMETERS; SOUND;
Keywords:
GEOPHYSICAL INVERSE PROBLEMS; LEAST SQUARES METHODS; UNDERWATER ACOUSTIC PROPAGATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
R.B. Evans e W.M. Carey, "FREQUENCY-DEPENDENCE OF SEDIMENT ATTENUATION IN 2 LOW-FREQUENCY SHALLOW-WATER ACOUSTIC EXPERIMENTAL-DATA SETS", IEEE journal of oceanic engineering, 23(4), 1998, pp. 439-447

Abstract

Shallow-water transmission loss measurements taken in 1988 and 1993 along the same cross slope track on the New Jersey shelf are examined for the frequency interval 50-1000 Hz. Computed results, using a geoacoustic model based on a linear frequency dependence of the sediment volume attenuation, showed less loss than the measured data at the higherfrequencies. A two stage, least squares procedure, is developed as a means of quantitatively examining the differences between the measuredand computed results. The procedure focuses on the frequency dependence of the sediment volume attenuation and allows the comparison between measurements and computations to be formulated as a statistical testof hypothesis. A geoacoustic model, using a nonlinear frequency dependency and reasonable uncertainty for the sediment volume attenuation, provides a good fit to the data.

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Documento generato il 09/07/20 alle ore 13:56:08