Abstract
The ocean is a complex, highly variable medium of acoustic propagation. Medium-induced variability in the acoustic index of refraction (sound speed) can have significant effects on acoustic propagation. Using the results of SACLANTCEN measurements in two diverse geographical areas, the present paper discusses the correlation between the temporal variability of ocean parameters and the fluctuations in acoustic propagation. Following a discussion of the relevant spatial and temporal scales, brief comments are made on the theoretical approaches to propagation in a random medium. This is followed by a discussion of selected results of measurements in the Mediterranean and in the North Atlantic. It is shown that fluctuations in acoustic transmission loss closely correlate with ocean variability resulting from internal waves, tides, tidally-advected changes in water masses, and ocean fine-structure.
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References
ALI, H.B. Spatial and temporal variabilities in underwater acoustic transmission: an analytical review, SACLANTCEN SM-166. La Spezia, Italy, SACLANT ASW Research Centre, 1983. [AD 129 959].
DESAUBIES, Y. Statistical aspects of sound propagation in the ocean. In: Urban, H. ed. Adaptive Methods in Underwater Acoustics, Dordrecht, Reidel, The Netherlands, 1985.
FLATTE, S.M., DASHEN, R., MUNK, W.H., WATSON, K.M. and ZACHARIASEN, F. eds. Sound Transmission through a Fluctuating Ocean. Cambridge, Cambridge University Press, 1979
USCINSKI, B.J., MACASKILL, C. and EWART, T.E. Intensity fluctuations. Part I: theory. Part II: comparison· with the Cobb experiment. Journal of the Acoustical Society of America 74. 1983: 1474–1499.
GREGG, M.C. Finestructure: oceanic “kinks and wiggles.” Naval Research Reviews 34. 1982: 52–72.
POLLARD, R. T. On the generation of inertial waves in the ocean. Deep-Sea Research 17. 1970: 795–812.
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© 1986 Springer, Berlin Heidelberg
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Ali, H.B., Akal, T., Hastrup, O.F. (1986). Temporal Variability in Shallow Water Acoustic Transmission and its Correlation with the Environment. In: Comte-Bellot, G., Williams, J.E.F. (eds) Aero- and Hydro-Acoustics. IUTAM Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82758-7_28
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DOI: https://doi.org/10.1007/978-3-642-82758-7_28
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-82760-0
Online ISBN: 978-3-642-82758-7
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