Course content

This course introduces and provides a basic understanding of underwater acoustics.

• Acoustic and elastic wave equations and propagation
• Reflection and transmission at ocean boundaries
• Oceanographic and physical properties
• Ray tracing in underwater environments
• Wavenumber integration technique for acoustic propagation modelling
• Normal mode approach for wave propagation in shallow water
• Principle of constructing underwater systems to generate and receive sound
• Sonar systems and signal processing
• Low-frequency noise measurements, particle motion, and its impact on marine life
• Case studies and wave propagation simulations
• Basic concepts and practical designs for underwater acoustic communication

Learning outcome

The course introduces underwater acoustics theory and techniques and the use of underwater acoustics for wave propagation modelling, detection and localization of objects and communication.

Knowledge: The candidate has

• Good knowledge of basic principles and understanding of wave propagation in underwater environments
• In-depth knowledge of techniques for modeling underwater wave propagation
• Detailed understanding of transducer configuration and sonar systems for detection and localization of objects.
• Good knowledge of the basic principle and signal processing tools for sonar applications and underwater communication.

Skills: The candidate can

• Analyze and model wave propagation in underwater environment using analytical and numerical models
• Analyze sonar systems for detection and localization of objects
• Use acoustic remote sensing to estimate the structure and composition of the seabed, and of oceanographic conditions.
• Use mathematical and theoretical knowledge to solve practical problems related to sonar, seismic applications and acoustic communication.

General competence:

The student can gain experience in

• the analysis of underwater acoustic systems,
• programming for modelling of wave propagation in underwater environments,
• the use of knowledge for solving practical problems
• understanding of underwater acoustic measurements

Learning methods and activities

• Lectures
• Theoretical exercises
• Numerical simulations
• Theoretical and numerical compulsory assignments

Compulsory assignments

• Theoretical exercises

Recommended previous knowledge

Knowledge in Acoustics (TTT4181) or equivalent.

Required previous knowledge

Knowledge in mathematics and physics corresponding to the 1st and 2nd years of the study program for electronics, and basic knowledge in acoustics and signal processing.

Course materials

Jens M. Hovem and Hefeng Dong: Understanding Ocean Acoustics, Cambridge Scholars Publishing, UK

Credit reductions