NDLI: Modeling Propagation and Reverberation Sensitivity to Oceanographic and Seabed Variability

Content Provider	IEEE Xplore Digital Library
Author	LePage, K.D.
Copyright Year	1976
Abstract	The propagation of bottom and oceanographic variability through to the variability of acoustic transmissions and reverberation is evaluated with a simple adiabatic model interacting with Gaussian distributed uncertainty in a narrow frequency band. Results show that there is significant sensitivity of time series and reverberation uncertainty to different types of environmental uncertainty. For propagation over uncertain bottoms, it is shown that it is that later part of the time series, corresponding to the highest angle energy reflecting most often off the surface and bottom, that is most sensitive to bottom uncertainty. This implies that the larger reverberation contributions from the highest grazing angles with the largest scattering strength is also the most uncertain. Conversely, it is the lowest angle arrivals which are most sensitive to uncertainty in the sound-speed profile. These behaviors are predicted analytically by the theory [K.D. LePage, in "Impact of Littoral Environmental Variability on Acoustic Predictions and Sonar Performance," Kluwer, 2002, pp. 353-360]
Sponsorship	IEEE Oceanic Engineering Society
Starting Page	402
Ending Page	412
Page Count	11
File Size	1054050
File Format	PDF
ISSN	03649059
Volume Number	31
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reverberation Acoustic propagation Uncertainty Acoustic scattering Acoustic waveguides Frequency Sonar Statistics Sea floor Oceans statistics acoustic scattering
Content Type	Text
Resource Type	Article
Subject	Ocean Engineering Mechanical Engineering Electrical and Electronic Engineering

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