Abstract
A special-purpose microcomputer-based system with attached array processor has been developed for generating numerical solutions to the parabolic wave equation for on-board applications. We call this system PESOGEN (Parabolic Equation Solution Generator). We discuss the principles of geo-acoustic modeling as implemented on PESOGEN including: water-sediment interface with range-dependent bathymetry, range-dependent gradients in sound speed and loss in sediment layer, sediment-basement interface and artificial absorption, and especially modeling of rough-bottom scattering. We also discuss the principles of pulse response function modeling as implemented on PESOGEN including: band-limited signals and analytic signals, time-domain transmission loss and phase plots, and time-domain reciprocity. Results and examples include propagation studies and computation of pulse response functions in acoustically complex geographical areas. These studies concentrate on the related issues of sensitivity to bathymetry, and rough-bottom scattering and broad-band coherence.
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References
F. Tappert, “Selected applications of the parabolic equation method in underwater acoustics”, in Intern. Workshop on Low-Frequency Propagation and Noise ( Woods Hole, MA, Woods Hole, 1974 ), Vol. 1, pp. 155–194.
F. Tappert, “The parabolic approximation method”, in Wave Propagation and Underwater Acoustics, ed. J.B. Keller and J.S. Papadakis Springer-Verlag Lecture Notes in Physics, Vol. 70, 1977 ), pp. 224–287.
L. Nghiem-Phu and F. Tappert, “Modelling of reciprocity in the time domain using the parabolic equation method”, J. Acoust. Soc. Am. 78 (1985).
L. Nghiem-Phu and F. Tappert, “Parabolic equation modelling of bathymetry: Sensitivity to bathymetric irregularity and rough bottom scattering”, J. Acoust. Soc. Am. Suppl. 1, 77, S102 (1985).
J.M. Berkson and J.E. Matthews, “Statistical properties of sea- floor roughness”, in Acoustics and the Sea-Bed, ed. N.G. Pace ( Bath Univ. Press, Bath, UK, 1983 ), pp. 215–223.
S.M. Flatte and F.D. Tappert, “Calculation of the effect of internal waves on oceanic sound transmission”, J. Acoust. Soc. Am. 58, 1151–1159 (1975).
L. Nghiem-Phu and H.A. DeFerrari, “A comparison of parabolic equation predictions with reciprocal transmission experiments in the Straits of Florida”, J. Acoust. Soc. Am. Suppl. 1: 75, S25 (1984).
D.J. Thomson and N.R. Chapman, “A wide-angle split-step algorithm for the parabolic equation”, J. Acoust. Soc. Am. 74, 1948–1954 (1983).
L. Nghiem-Phu, “Numerical modeling of acoustic tomography in the Straits of Florida”, Ph.D. Dissertation, Univ. Miami, May 1985.
H. A. DeFerrari and H. Nguyen “Acoustical reciprocal transmission experiments, Florida Straits”, submitted to JASA, March 1985.
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© 1986 Plenum Press, New York
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Tappert, F.D., Nghiem-Phu, L. (1986). Modeling of Pulse Response Functions of Bottom Interacting Sound Using the Parabolic Equation Method. In: Akal, T., Berkson, J.M. (eds) Ocean Seismo-Acoustics. NATO Conference Series, vol 16. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2201-6_13
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DOI: https://doi.org/10.1007/978-1-4613-2201-6_13
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-9293-7
Online ISBN: 978-1-4613-2201-6
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