Zobrazeno 1 - 10
of 24
pro vyhledávání: '"E. L. Borodina"'
Autor:
E. L. Borodina, Yu. V. Petukhov
Publikováno v:
Acoustical Physics. 67:486-493
Publikováno v:
Acoustical Physics. 66:162-177
Using approximate analytical calculations based on the WKB and adiabatic approximations for the mode representation of the field, as well as numerical simulation based on the theory of adiabatic modes, geometric acoustic approximation, and the parabo
Publikováno v:
Acoustical Physics. 64:479-491
The paper considers the regular patterns that can be manifested in the behavior of the invariant of the spatial–frequency interference structure of an acoustic field in oceanic waveguides that are homogeneous and inhomogeneous along a track. Using
Publikováno v:
Acoustical Physics. 63:63-75
The paper studies the patterns manifesting themselves in the formation and propagation of caustic and weakly diverging beams using the geometric acoustic approximation and mode theory applied to the simplest model of an underwater sound channel open
Publikováno v:
Acoustical Physics. 58:666-677
On the basis of an earlier developed model of sound scattering by surface disturbances characterized by 3D roughness spectra, we propose and test a sufficiently fast algorithm for calculating the spectral power density of surface reverberation that t
Autor:
Yu. V. Petukhov, E. L. Borodina
Publikováno v:
Acoustical Physics. 56:1050-1056
It is established that the existence of weakly divergent beams in an oceanic waveguides leads, in a certain time interval and depth range, to the formation of a characteristic triplet structure of wavefronts. It is explained that a weakly diverging b
Autor:
B. M. Salin, E. L. Borodina
Publikováno v:
Acoustical Physics. 56:675-683
Scattering of a tonal low-frequency (up to 400 Hz) acoustic signal on a rough surface during its propagation along stationary paths in a shallow water area is considered. A calculation technique of estimating the spectral power density of the signal
Autor:
M. B. Salin, E. L. Borodina
Publikováno v:
Izvestiya, Atmospheric and Oceanic Physics. 46:239-248
The technique of operative measurements of wind-induced wave characteristics based on video imaging of the sea surface and simultaneously measuring the current spectra of wind waves using an anchored buoy is presented. This technique makes it possibl
Autor:
B. M. Salin, E. L. Borodina
Publikováno v:
Acoustical Physics. 54:327-336
The problem of scattering from a rough sea surface is considered for a harmonic low-frequency (200–400 Hz) acoustic signal propagating in a shallow water area. An experimental study of the azimuthal reverberation dependence is carried out on the ba
Autor:
B. M. Salin, E. L. Borodina
Publikováno v:
Acoustical Physics. 52:648-654
The angular and spectral characteristics of reverberation signals on a fixed path are studied by using vertical receiving arrays with a tonal insonification of the basin. The choice of the frequency range F ∼ 200–300 Hz is caused, first, by the l