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Examination of Signal Dispersion in a 3-D Wedge-Shaped Waveguide using 3DWAPE

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In this paper, we solve numerically the problem of a broadband pulse propagation in a three-dimensional waveguide. The numerical method used to solve this 4-D (i.e., three space dimensions plus time) acoustic problem is based on Fourier synthesis of frequency-domain solutions. The calculations in 3-D relative to each discrete frequency are done using the fully three-dimensional Parabolic Equation based code 3DWAPE. Numerical simulations are performed considering a source pulse centered at 25 Hz with a bandwidth of 40 Hz, propagating in a 3-D shallow water penetrable wedge-shaped waveguide. The results, displayed as stacked time series vs. depth, exhibit interesting and typical three-dimensional effects as (mode) shadow zones and multiple (mode) arrivals of the propagating signal.
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Document Type: Research Article

Publication date: 2002-09-01

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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