ATI's Advanced Topics In Underwater Acoustics
This four-day course summarizes both basic and “leading-edge” topics in underwater acoustics. In each topic the basics
principles are reviewed and then current achievements and challenges are addressed. The course provides an in-depth
treatment, taught by experts in the field, of the latest results in a selection of core topics of underwater acoustics. Its aim is to make available practical results and lessons-learned in a tutorial form suitable for a broad range of people
working in underwater acoustics and sonar. The course is designed for sonar systems engineers, combat systems
engineers, undersea warfare professionals, and managers who wish to enhance their understanding and become familiar
with the "big picture" of ocean acoustics and sonar.
Dr. Duncan Sheldon did his graduate work at MIT and earned the PhD Degree in 1969. He has over twenty-five
years’ experience in the field of active sonar signal processing. A substantial portion of this experience was at the
Navy’s undersea warfare laboratories at New London, CT, and Newport, RI. This experience consisted primarily of
developing ASW detection and classification algorithms and new active sonar waveforms. His experience includes
real-time direction at sea of surface sonar assets during ’free-play’ NATO ASW exercises. He was also a sonar
supervisor during controlled and ’free-play’ NATO ASW exercises. He documented the results obtained at sea in
reports published at the NATO Centre for undersea research at La Spezia, Italy. He has published articles in the U.S.
Navy Journal of Underwater Acoustics.
Paul C. Etter has worked in the fields of ocean-atmosphere physics and environmental acoustics for the past thirty-
five years supporting federal and state agencies, academia and private industry. He received his BS degree in Physics
and his MS degree in Oceanography at Texas A&M University. Mr. Etter served on active duty in the U.S. Navy as
an Anti-Submarine Warfare (ASW) Officer aboard frigates. He is the author or co-author of more than 180 technical
reports and professional papers addressing environmental measurement technology, underwater acoustics and physical
oceanography. Mr. Etter is the author of the textbook Underwater Acoustic Modeling and Simulation (3rd edition).
Dr. Harold "Bud" Vincent, Research Associate Professor of Ocean Engineering at the University of Rhode Island
and President of DBV Technology, LLC is a U.S. Naval officer qualified in submarine warfare and salvage diving.
He has over twenty years of undersea systems experience working in industry, academia, and government (military
and civilian). He served on active duty on fast attack and ballistic missile submarines, worked at the Naval Undersea
Warfare Center, and conducted advanced R&D in the defense industry. Dr. Vincent received the M.S. and Ph.D.
in Ocean Engineering (Underwater Acoustics) from the University of Rhode Island. His teaching and research
encompasses underwater acoustic systems, communications, signal processing, ocean instrumentation, and navigation.
He has been awarded four patents for undersea systems and algorithms.
Contact these instructors (please mention course name in the subject line)
- Provide a general understanding of ocean acoustics and sonar principles
- Make attendees conversant with all aspects of ocean acoustics and sonar technology, engineering and performance
assessment in the context of naval applications.
- Provide detailed, critical knowledge for understanding of basic concepts in ocean acoustics, physics and modeling,
transduction technology and engineering, processing for sonar signal detection and estimation, and sonar system design
and performance assessment.
- Provide understanding of the design, development and use of the acoustic propagation modeling software.
- Provide information and perspectives on new and emerging sonar technology and techniques and new sonar system
configurations and functions.
- Sound and the Ocean Environment. Conductivity, Temperature, Depth (CTD). Sound Velocity Profiles.
Refraction, Transmission Loss, Attenuation, Surface and Bottom Effects.
- SONAR Equations Review of Active and Passive SONAR Equations, Decibels, Source Level, Sound
Pressure Level, Intensity Level, Spectrum Level. Shallow Water Sound Propagation, Modeling and Sediment
Acoustics ( Modal Propagation, Rays and Modes, Bottom Loss, Coupled normal Modes, PE, Sediment
Acoustics-Biot theory and frequency dependent attenuation. Coherency .Summary tables (Day 2 Morning )
- Signal Detection. Overcoming Noise and Reverberation, Normalization, Array Gain, Processing Gain,
Beamforming, Time-delay and Frequency Spreading Effects.
- Active Sonar Waveforms. Narrowband and wideband alternatives. Ambiguity functions. Range-Doppler
- SONAR System Fundamentals. 4. SONAR System Fundamentals. Review of major system components in
a SONAR system (transducers, signal conditioning, digitization, signal processing, displays and controls).
Review of various SONAR systems (Hull, Towed, SideScan, MultiBeam, Communications, Navigation, etc.)
- SONAR Employment, Data and Information. Hull arrays, Towed Arrays. Their utilization to support Target
- Passive Ranging to an In-Coming Torpedo. Time-delay estimation algorithms.
- Target Motion Analysis (TMA). What it is, why it is done, how is SONAR used to support it, what other
sensors are required to conduct it.
- Time-Bearing Analysis. How relative target motion affects bearing rate, ship maneuvers to compute passive
range estimates (Ekelund Range). Use of Time-Bearing information to assess target motion.
- Time Frequency Analysis. Narrowband Doppler Shift, Wideband Doppler Transformation, Base Banding.
- Geographic Analysis. Use of Time-Bearing and Geographic information to analyze contact motion.
- Multi-sensor Data Fusion. SONAR, RADAR, ESM, Visual.
- Relative Motion Analysis and Display. Single steady contact, Single maneuvering contact, Multiple contacts,
Acoustic Interference, Clutter.
Tuition for this four-day course is $2145 per person at one of our scheduled public courses. Onsite pricing is available. Please call us at 410-956-8805 or send an email to ATI@ATIcourses.com.