3D models of sound propagating in shallow water Alexander Tshoidze Voronezh State University

m Antenna Vertical Linear array (VLA) at two depths Range km source Hz Horizontal linear 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 from Woods 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, B. Katsnelson. A.Tshoidze, J.Lynch, Ta-Wei Wang Space 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 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 B. Katsnelson, A. Tshoidze – Voronezh State University, Russia J. 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 с. 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 B. Katsnelson, A. Tshoidze – Voronezh State University, Russia M. 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 from our 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 model 2. Comparing results of our model with data of the experiment SWARM’06 Supported by CRDF VZ-010-0, RFFR