Sensitivity of echo envelope fractal dimension to bottom type and bottom depth - numerical results

• Autorzy: Łubniewski Z.
• Języki publikacji: EN

Abstrakty

EN

The presented results are a part of those obtained within the author's latest work on application of normal incidence methods in acoustic seafloor characterisation. The work included both theoretical and experimental studies on selection of appropriate methods of seafloor echo processing and feature extraction for characterisation of the bottom type, especially, the study of the usefulness of several echo parameters like fractal dimension or statistical moments of the echo envelope. In this paper, the simulation results of the echo envelope fractal dimension dependence on bottom type and bottom depth are presented. They show that to same extent, fractal dimension of an echo may be useful for bottom identification even in a case of varying depth, however, more detailed, theoretical as well as experimental studies are needed.

Słowa kluczowe

EN

acoustic; seafloor; hydroacoustics

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2003
• Tom: Vol. 6
• Strony: 195--198
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Łubniewski Z.

• Gdańsk University of Technology, Department of Remote Sensing Systems, Gdańsk, Poland

Bibliografia

• 1. R. C. Chivers, N. Emerson, D. R. Bums, New acoustic processing for underway surveying, The Hydrographic Journal, Vol. 56, 8-17,1990.
• 2. Z. Łubniewski A. Stepnowski, Application of the fractal analysis in the sea bottom recognition, Archives of Acoustics, Vol. 23(4),499-511, 1998.
• 3. J. Tęgowski, Z. Łubniewski, The use of fractal properties of echo signals for acoustical c1assification ofbottom sediments, Acta Acustica, Vol. 86(2),276-282,2000.
• 4. D. R. Jackson, D. P. Winebrenner, A. Ishimaru, Application of the composite roughness model to high-frequency bottom backscattering, J. Acoust. Soc. Am., Vol. 79, 1410-1422, 1986.
• 5. E. Pouliquen, O. Bergem, H. G. Pace, Time-evolution modeling of seafloor scatter. I. Concept., J. Acoust. Soc. Am., Vol. 105,3136-3141,1999.
• 6. H. M. Hastings, G. Sugihara, Fractals. A user's guide for the natural sciences, Oxford University Press, 7-77, Oxford, New York, Tokyo 1994.