Mid-frequency acoustic propagation in shallow water on the New Jersey shelf: Mean intensity

Mid-frequency ( 1 - 10 kHz ) sound propagation was measured at ranges 1 - 9 km in shallow water in order to investigate intensity statistics. Warm water near the bottom results in a sound speed minimum. Environmental measurements include sediment sound speed and water sound speed and density from a...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2008-09, Vol.124 (3), p.EL85-EL90
Main Authors: Tang, Dajun, Henyey, Frank S., Wang, Zhongkang, Williams, Kevin L., Rouseff, Daniel, Dahl, Peter H., Quijano, Jorge, Choi, Jee Woong
Format: Article
Language:English
Subjects:
Acoustics
Atlantic Ocean
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Geologic Sediments
Models, Theoretical
Motion
New Jersey
Physics
Radar
Sound
Sound Spectrography
Temperature
Time Factors
Underwater sound
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Summary:Mid-frequency ( 1 - 10 kHz ) sound propagation was measured at ranges 1 - 9 km in shallow water in order to investigate intensity statistics. Warm water near the bottom results in a sound speed minimum. Environmental measurements include sediment sound speed and water sound speed and density from a towed conductivity-temperature-depth chain. Ambient internal waves contribute to acoustic fluctuations. A simple model involving modes with random phases predicts the mean transmission loss to within a few dB. Quantitative ray theory fails due to near axial focusing. Fluctuations of the intensity field are dominated by water column variability.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.2963043