EFFECT OF OCEAN INHOMOGENEITIES ON NOISE-FIELD ANISOTROPY

This paper considers some results of experimental studies conducted by the authors, addressing the causes of the anisotropy of natural ocean noise and its parameters of variations. The characteristics of ocean inhomogeneities affecting ocean noise fields are analyzed. Their influ ence on a lens of foreign water, congestions of migrating bionts, an i nternal wave, a squall with rain, and a seamount is examined. The expe riments were conducted with the use of vertical linear antenna arrays during expeditions of the research vessel Akademik Nikolai Andreev in various oceans. The results are compared to calculations obtained usin g a model constructed in the framework of ray theory allowing for inho mogeneities in noise-generating water areas. The effect of deviations of the antenna axis from the vertical on the measurement data is analy zed.