3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1087-C5-1090
On optimization possibility for ocean acoustic tomography systemA.G. SEMENOV
N.N. Andreev Acoustics Institute, Russian Academy of Sciences, 4 Shvernik str., Moscow 117036, Russia
This work shows results of sound signal amplitude fluctuation measurements in comparably narrow envelope frequency spectrum interval from 1.5 to 6.0 mHz obtained on different stationary tomographic systems - 100 km, 100 Hz in Barentz sea and 320 km, 400 Hz in Okhotsk sea. Use of this range, from our point of view, in any ocean region allows to decrease influence of two meeting ocean wave processes - surface wind waves from high frequency side and internal as well as long surface waves from low frequency side. This interval according to several previously fulfilled oceanographic researches could be considered as some kind of "transparency window" for different natural ocean processes responsible for sound fluctuations spectrum. Measurements presented demonstrate such possibility and allow to choose optimal envelope frequency analysis interval for tomographic systems installed in quite different regions.
© EDP Sciences 1994