NDLI: Spatial extension of the acoustic time reversal region

Content Provider	Springer Nature Link
Author	Zverev, V. A. Korotin, P. I. Stromkov, A. A.
Copyright Year	2008
Abstract	According to the data of a full-scale shallow-water experiment (in the Barents Sea, at sea depths of about 120 m), a considerable gain in the signal-to-noise ratio is obtained for an acoustic signal received from a source at a distance of 12 km when matching with the medium is performed by the signal from the same source at a distance of 10.5 km. To interpret this experimental fact, a numerical simulation is performed to determine the size of the region of signal focusing due to the time reversal of waves in an ideal waveguide with a soft bottom. It is shown that, for narrowband signals, within a distance of ±5 km along the path from the point of emission of the reversed signal, a regular interference pattern whose maxima are comparable with the principal maximum is observed throughout the whole waveguide depth. For a spectrum width from 100 to 300 Hz, only the principle maximum with an extension of about 100 m is observed at a single depth.
Starting Page	711
Ending Page	717
Page Count	7
File Format	PDF
ISSN	10637710
Journal	Acoustical Physics
Volume Number	54
Issue Number	5
e-ISSN	15626865
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2008-09-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wave front reconstruction, acoustic time-reversal, and phase conjugation Active sonar systems Passive sonar systems and algorithms, matched field processing in underwater acoustics Acoustics
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics

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