3D models of sound propagating in shallow water
Alexander Tshoidze
Voronezh State University
50-200 m
Antenna
VerticalLinear array(VLA)at two depths
Range 10-100 km
source60-600Hz
Horizontallinear array (HLA)
Scheme of the shallow water problem model
What model do we construct
Acoustical model
of intensity fluctuations
of sound propagating
in presence of
temperature front,
internal waves,
depth slopes
and other
waveguide obstacles.
Polar front in the Barents sea
Oceanographic data was given by James F. Lynch fromWoods Hole Oceanographic Institution, MA, USA
The chart of horizontal refraction in the area close to temperature front
Arctic current
Northern-Atlantic current
My publications on the topic
1. B. Katsnelson, J. Lynch, A. Tshoidze Space-frequency distribution of sound field intensity in the neighborhood of a temperature front in shallow water // Acoustics Journal, August, 2007.
2. B. Katsnelson. A.Tshoidze, J.Lynch, Ta-Wei WangSpace frequency sound field distribution in the neighborhood of a temperature front // 147 Meeting Acoustical Society of America, San Diego, JASA, Vol. 116, Issue 4, 2004, Pp.2535-2536. 3. B. Katsnelson, J. Lynch, A. Tshoidze Space-frequency distribution of sound field intensity in the neighborhood of a temperature front in shallow water // XVII session of the Russian Acoustical Society, Moscow, Akustika Okeana, 2006, Pp. 92-95.
B. Katsnelson, A. Tshoidze – Voronezh State University, RussiaJ. Lynch, Ta-Wei Wang - Woods Hole Oceanographic Institution, Woods Hole, MA, USA
My speech at the meeting on the topic
Propagating of complex signal
My publications on the topic
1. B. Katsnelson, M. Badiey, J. Lynch, A. Tshoidze Low frequency sound pulses propagation in shallow water // Proceedings of the 8th European conference on Underwater Acoustics, Portugal, 8th ECUA, 2006, Pp. 217-222с. 2. B. Katsnelson, M. Badiey, A. Song, A. Tshoidze Propagation of modulated pulses in shallow water // 150th Meeting Acoustical Society of America, Providence, USA, JASA, Vol. 119, Issue 5, 2006, p. 3346.
B. Katsnelson, A. Tshoidze – Voronezh State University, RussiaM. Badiey, A. Song - University of Delaware, DE, USA J. Lynch - Woods Hole Oceanographic Institution, Woods Hole, MA, USA
Link to experiment Shallow Water Acoustic Remote
Measurements (SWARM’95)
New Jersey continental shelf, USA
A kind of data fromour American colleagues
Correlation of our model with the experiment
Data processing …… and results!
Delaware workshop on SWARM’95
April, 2005
Delaware workshop is going on
Future work
1. Creating complex sound field model, especially
phasefront model2. Comparing results of our
model with data of the experiment SWARM’06
Supported by CRDF VZ-010-0, RFFR 03-05-64568