Skip to main content

News about Scitation

In December 2016 Scitation will launch with a new design, enhanced navigation and a much improved user experience.

To ensure a smooth transition, from today, we are temporarily stopping new account registration and single article purchases. If you already have an account you can continue to use the site as normal.

For help or more information please visit our FAQs.

banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
1. D. A. Abraham and A. P. Lyons, “ Novel physical interpretations of K-distributed reverberation,” IEEE J. Ocean. Eng. 27(4), 800813 (2002).
2. D. E. Weston and J. Revie, “ Fish echoes on a long-range sonar display,” J. Sound Vib. 17, 105106 (1971).
3. J. R. Apel, M. Badiey, C.-S. Chiu, S. Finette, R. Headrick, J. Kemp, J. F. Lynch, A. Newhall, M. H. Orr, B. H. Pasewark, D. Tielbuerger, A. Turgut, K. von der Heydt, and S. Wolf, “ An overview of the 1995SWARM shallow water internal wave acoustic scattering experiment,” IEEE J. Ocean. Eng. 22, 465500 (1997).
4. D. Tang, J. N. Moum, J. F. Lynch, P. Abbot, R. Chapman, P. H. Dahl, T. F. Duda, G. Gawarkiewicz, S. Glenn, J. A. Goff, H. Graber, J. Kemp, A. Maffei, J. D. Nash, and A. Newhall, “ Shallow Water'06: A joint acoustic propagation/nonlinear internal wave physics experiment,” Oceanogr. 20(4), 156167 (2007).
5. A. Turkington, A. Eydeland, and S. Wang, “ A computational method for solitary internal waves in a continuously stratified fluid,” Stud. Appl. Math. 85, 93127 (1991).
6. D. Tang and D. R. Jackson, “ Application of small-roughness perturbation theory to reverberation in range-dependent waveguides,” J. Acoust. Soc. Am. 131(6), 44284441 (2012).
7. L. B. Dozier and F. D. Tappert, “ Statistics of normal mode amplitudes in a random ocean. I. Theory,” J. Acoust. Soc. Am. 63(2), 353365 (1978).
8. E. I. Thorsos and J. Perkins, “ Overview of the reverberation modeling workshops,” in Proceedings of the International Symposium on Underwater Reverberation and Clutter (2008), pp. 322.

Data & Media loading...


Article metrics loading...



Clutter is related to false alarms for active sonar. It is demonstrated that, in shallow water, target-like clutter in reverberation signals can be caused by nonlinear internal waves. A nonlinear internal wave is modeled using measured stratification on the New Jersey shelf. Reverberation in the presence of the internal wave is modeled numerically. Calculations show that acoustic energy propagating near a sound speed minimum is deflected as a high intensity, higher angle beam into the bottom, where it is backscattered along the reciprocal path. The interaction of sound with the internal wave is isolated in space, hence resulting in a target-like clutter, which is found to be greater than 10 dB above the mean reverberation level.


Full text loading...


Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd