Autor: Pereselkov, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Horizontal refraction and acoustic signals fluctuations caused by internal waves packets in shallow water
Autorzy:: Katsnelson, B.
Pereselkov, S.
Powiązania:: https://bibliotekanauki.pl/articles/332099.pdf
Data publikacji:: 1999
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: The subject of the paper is to consider the propagation of low frequency sound field in shallow water in presence of soliton-like internal waves (SLLW). It is supposed that shallow water parameters are closed lo ones of acoustic trace in Yellow Sea. We assume as well that SLIW spread across stationary acoustic trace. The problem of sound propagation is considered within the framework of 3-D model of the shallow water. The theory of "horizontal rays and vertical modes" is applied to take into account influence of horizontal refraction due to SLIW. As shown in the paper SLIW lead periodically to "focusing" and "defocusing" of the horizontal rays. The estimations of the sound fluctuations due to SLIW demonstrates that value of fluctuations can reach up to 10-20 dB (between moments of the "focusing" and "defocusing"). The results presented in the paper can be used as basis of remote sensing of the internal waves packets in shallow water.
Źródło:: Hydroacoustics; 1999, 2; 307-312
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Acoustic field in shallow water at presence of internal solitons
Autorzy:: Katsnelson, B.
Pereselkov, S.
Powiązania:: https://bibliotekanauki.pl/articles/332554.pdf
Data publikacji:: 2000
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: In the paper the transformations of sound field structure conditioned by packets of internal solitons (IS) are considered within the framework of the theory "horizontal rays and vertical modes". We analyze a two cases of the acoustic trace orientation in relation to front of IS. It is shown that acoustic effects have resonant frequency dependence when internal solitons propagate along trace. It is ascertained as well, that the IS can lead to formation of "dynamic" horizontal sound channels and as result the significant temporary fluctuations of acoustic signals will be on an acoustic trace oriented along front of internal waves. The results presented in the paper can be used as basis for the remote monitoring of the characteristics of internal solitons in ocean shelf.
Źródło:: Hydroacoustics; 2000, 3; 115-120
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: 3D sound intensity variability in shallow water in presence of internal waves in SWARM95 experiments
Autorzy:: Badiey, M.
Katsnelson, B.
Lynch, J.
Pereselkov, S.
Siegmann, W.
Powiązania:: https://bibliotekanauki.pl/articles/332334.pdf
Data publikacji:: 2003
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: 3D sound
SWARM'95 experiment
acoustic
Opis:: Broadband shot signal data are analyzed from the SWARM'95 experiment to investigate acoustic variability in presence of internal solitons. A 10 to 15 minute temporal variations in the intensity of the received signals were observed. These temporal variations are azimuthally dependent on variability of water column in the presence of internal solitary waves. These fluctuations should be explained by significant horizontal refraction (3D-effects) taking place when orientation of acoustic track is close to direction of the wave front of internal solitons. Analysis on the base of both equation of vertical modes/horizontal rays and PE in horizontal plane is carried out, good agreement between theoretical calculations and experimental data is obtained.
Źródło:: Hydroacoustics; 2003, 6; 101-112
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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