Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Robert L. Field"'
Autor:
Jacob George, Robert L. Field
Publikováno v:
Acoustics Research Letters Online. 6:263-267
Acoustic propagation through sound speed profiles (SSPs) that are periodic in range and geotime is studied using the parabolic equationmodel and the WKB/adiabatic model. Fluctuations are shown to be significantly reduced when acoustic propagation is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77bae60dd67782b5e612cdd5016cdb2d
https://doi.org/10.1121/1.2033087
https://doi.org/10.1121/1.2033087
Autor:
Zachariah R. Hallock, Robert L. Field
Publikováno v:
Journal of Physical Oceanography. 35:3-12
Internal-wave energetics derived from moored acoustic Doppler current profiler (ADCP) observations on the New Jersey shelf are described. Horizontal and vertical velocity components from three 40-day ADCP records acquired near the shelf edge south of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df0fe76076060966eac4506e2ce259fa
https://doi.org/10.1175/jpo-2662.1
https://doi.org/10.1175/jpo-2662.1
Publikováno v:
Continental Shelf Research. 20:2045-2057
A novel analysis method, suitable for first-mode internal waves, is employed to examine moored temperature and current data at the Malin Shelf edge. Current velocity and temperature profile time series data from two moorings at the Malin Shelf edge f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db927ddcf8d34c77a41033b673270afa
https://doi.org/10.1016/s0278-4343(00)00058-3
https://doi.org/10.1016/s0278-4343(00)00058-3
Autor:
Robert L. Field, Michael K. Broadhead
Publikováno v:
The Journal of the Acoustical Society of America. 99:2524-2529
As pointed out by Zhou et al. [J. Acoust. Soc. Am. 90, 2042–2054 (1991)], nonlinear shallow‐water solitary internal waves (SIW’s) can enhance the bottom interaction of underwater sound. For a lossy ocean bottom, this has the effect of a level c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb5986123be0f9661060c0c2a974e485
https://doi.org/10.1121/1.415774
https://doi.org/10.1121/1.415774
Publikováno v:
The Journal of the Acoustical Society of America. 98:248-260
In general, higher‐order correlation detectors perform well in passive detection for signals of high third‐ and fourth‐order moments. Previous studies by the authors have shown that the normalized third‐ and fourth‐order signal moments are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49167c65dbbf81c502540649c38b1a58
https://doi.org/10.1121/1.414332
https://doi.org/10.1121/1.414332
Publikováno v:
The Journal of the Acoustical Society of America. 95:1459-1473
Prefiltering, or limiting the passband of a received signal, can be used to improve ordinary correlation threshold detector performance for an unknown source model. For the known source model, the cross‐correlation detector is equivalent to matched
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2603f44de29f4d0eba13ce18699f228
https://doi.org/10.1121/1.408587
https://doi.org/10.1121/1.408587
Publikováno v:
The Journal of the Acoustical Society of America. 94:1385-1399
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efe595952d1a776c34e8ec0418ded624
https://doi.org/10.1121/1.408167
https://doi.org/10.1121/1.408167
Publikováno v:
The Journal of the Acoustical Society of America. 94:994-1002
In this paper various measurements of acoustic time series recorded in the Atlantic over source‐to‐receiver ranges of 600 to 12 900 m are analyzed. The transmitted source signature with a monitor hydrophone mounted on the source array was also re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35df9674d285e702bc914fb64689e224
https://doi.org/10.1121/1.408201
https://doi.org/10.1121/1.408201
Autor:
Juliette W. Ioup, Lisa A. Pflug, Grayson H. Rayborn, Robert L. Field, Kenneth H. Barnes, George E. Ioup
Publikováno v:
The Journal of the Acoustical Society of America. 91:2763-2776
Higher‐order cross and ordinary correlation detectors are applied to four deterministic transients contaminated by uncorrelated Gaussian noise only. Histograms and moments are used to examine the properties of the signals and their effect on detect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad5581fe2c5413236880b10ce85701a3
https://doi.org/10.1121/1.402957
https://doi.org/10.1121/1.402957
Publikováno v:
The Journal of the Acoustical Society of America. 91:975-988
Higher‐order correlations and spectra may be used for detection, time delay estimation, classification, and discrimination of signals. For these applications, a detailed knowledge of their attributes can be highly useful. In this paper, the propert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46dc6ff3d514348d1f7e17b90efc94e6
https://doi.org/10.1121/1.402503
https://doi.org/10.1121/1.402503