Abstract

The Vector - Phase Structure Features of Superlow Frequency Fluctuations of Acoustic Fields, Stimulated by Interaction with Internal Waves, Generated by a Streamlined Body

B.I.Goncharenko, V.A.Gordienko (Department of Acoustics, Faculty of Physics, Moscow State University, Moscow, Russia)

e-mail: vectorfaza@yandex.ru

The experimental dates of superlow frequency fluctuations of the acoustic signal fields from the determined source on internal waves, generated by a body, streamlined by a water are discussed. As a receiving system the hydroacoustics radiobuoy removed from a signal source on 6 - 10 miles was used, which one registered sound pressure and three orthogonal oscillatory velocity components. There is experimentally shown increasing of a fluctuations level in the Viasial frequencies area in a site of realization of measurements (0,012-0,015 Hz) on the sound pressure and the oscillatory velocity horizontal component, directed to the oscillator channels and of the signal arrival angle. In the vertical component of oscillatory velocity spectrum of envelopes doubling of frequency and appearance of the waves team in the field of a disturbance by 3-5 periods of general expansion in space is observed. With the time, the waves team loses energy, exciting in environment of oscillation on frequencies, near to Viasial frequency, and extended amplitude of background fluctuations on frequencies are lower 2 · 10 .3 Hz through the 30 - 40 minutes period. The theoretical interpretation of the excitation mechanism of the internal waves short waves team is offered.

Section : 6