Experimental study of mode selection in shallow-water sea

• Published in: Acoustical physics Vol. 58; no. 3; pp. 288 - 300
• Main Authors: Grinyuk, A. V., Burdukovskaya, V. G., Zverev, V. A., Kravchenko, V. N., Kovalenko, V. V., Luchinin, A. G., Malekhanov, A. I., Trofimov, A. T., Trusova, O. I., Smirnov, I. P., Stromkov, A. A., Khil’ko, A. I.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-05-2012
• Subjects: Acoustics; Ocean Acoustics. Hydroacoustics; Physics; Physics and Astronomy; pulses; acoustic sounding; filtration matching; hydroacoustic emitter arrays; coherence; shallow sea
• ISSN: 1063-7710; 1562-6865
• DOI: 10.1134/S1063771012020054

The possibilities of matching low-frequency underwater sound pulses to the parameters of an oceanic waveguide are considered. The objective is to optimize the system of few-mode tomographic observation in a shallow-water sea. Experimental data are analyzed for two methods of selecting the low-frequency fewmode pulses propagating in a shallow-water sea. The first method excites probe pulses by vertically elongated arrays, with spatial filtering after vertical or horizontal arrays receive the pulses. The second method is based on exciting broadband signals with linear frequency modulation by a single transmitter. The selection of the few-mode signal is performed by time strobing the signals at the output of the matched filter after a horizontal array receives the pulses. The distance between the sound sources and receiving systems varied from 10 to 300 km.