Home page of the Russian Acoustical Society Proceedings of the X Session of the Russian Acoustical Society
 
Ocean Acoustics

V.D. KRUPIN
ON THE FEATURES OF THE DEPENDENCE OF THE MONOCHROMATIC SOUND SIGNAL PROPAGATION ANOMALY IN THE SHALLOW -WATER REGIONS F THE ARCTIC BASIN ON THE ICE COVER THICKNESS
Andreyev Acoustics Institute,
ul. Shvernika 4, Moscow, 117036 Russia.
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The normal-mode calculations results of the monochromatic sound signal propagation anomaly for one of shallow-water regions of the Arctic basin obtained under the ice cover thickness l changing are discussed. These results indicates that at the low frequencies the anomaly monotonously decreases as the l increases, and beginning from the some enough high frequency it becomes the double-value function of the l with a single minimum at the l=lmin and rapidly approximates to the constant value at the high frequency for the values l>lmin as the l increase. Such behaviour of the anomaly under the ice cover thickness changing is explained by the peculiarities of the dependence of the modal attenuation coefficients on the l and its distribution in mode numbers. Besides, it is confirmed by the explicit anomaly expression derived by using the Wentzel-Kramers-Brillouin method.