M.M.Divizinyuk
Changes in acoustical characteristics of the shelf regions of the Black Sea caused by constant streams

Acoustic bulletin, Vol. 2 3, (1999) p.42-48
In the article the results of picking up of sound speed in shelf regions of the Black Sea during different climatic seasons are discussed. The parameters of acoustic fields are analyzed using techniques of beam theory. The results of seaborne experiments for detection of different underwater objects located on the sea bottom. It has been shown that the constant streams in shelf regions give rise to sound speed anomalies at the bottom in form of asymmetric narrow waveguides. When using the acoustic properties of mentioned waveguides it is possible to increase significantly the distance of detection of the objects located on the sea bottom.
KEY WORDS:
shelf area, a constant stream, sound velocity anomaly, the detection range of bottom objects
TEXT LANGUAGE: Russian