Mode coupling in a coastal wedge due to quasi-crossing of range-dependent modal eigenvalues.
JASA Express Lett
; 3(1): 016001, 2023 Jan.
Article
em En
| MEDLINE
| ID: mdl-36725538
ABSTRACT
A specific mechanism of mode coupling in a waveguide propagation is studied when two range-dependent eigenvalues approach each other. This phenomenon is analogous to the so-called quasi-crossing of states in atomic physics (Landau-Zener theory). It is considered for the sound wave propagation in a coastal wedge in the presence of a sound-speed profile. The change in mode composition and the corresponding spatial variability of the sound field are analyzed by using modes coupling equations and the parabolic equation with a field decomposition over adiabatic modes, respectively.
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MEDLINE
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En
Ano de publicação:
2023
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Article