NDLI: Observation of dispersion and azimuthal dependence of broadband acoustic signals in shallow water

Content Provider	IEEE Xplore Digital Library
Author	Badiey, M. Yongke Mu Lynch, J.F. Wolf, S.N. Houk, G.M.
Copyright Year	2000
Description	Author affiliation: Coll. of Marine Studies, Delaware Univ., Newark, DE, USA (Badiey, M.)
Abstract	A multi-institutional acoustic experiment was conducted in 1995 on the New Jersey continental shelf to examine the Shallow Water Acoustics in Random Media (SWARM'95). Two major source/receiver geometries were established. One was parallel to the continental shelf edge and the other was perpendicular to it. The parallel propagation consisted of two different broadband sources transmitting signals nearly perpendicular to the internal wave propagation direction. These signals were a transient airgun source (0.1 sec duration) and a linear frequency modulated sweep (30 sec duration). Placed above and below the thermocline, these sources were transmitting signals every minute for few hours at a given range. The transmissions were received by two vertical line arrays at different ranges and angles from the source. During the same period, the internal wave activity in the same region was measured and solitary wave interactions with acoustic signals along the two propagation paths are examined. A 10 to 15 minute temporal variations in the intensity of the received signals were observed. These temporal variations are azimuthally dependent on the variability of water column in the presence of internal solitary waves.
Starting Page	859
Ending Page	864
File Size	611787
Page Count	6
File Format	PDF
ISBN	0780365518
DOI	10.1109/OCEANS.2000.881367
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic propagation Acoustic measurements Sea measurements Sensor arrays Laboratories Random media Frequency Acoustic waves Acoustic pulses Graphics
Content Type	Text
Resource Type	Article

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