Principles of underwater sound

The objective of this chapter is to provide the notation and basic concepts of underwater sound that may be found useful for understanding both the description of cetacean sound and the use of the sonar equation. The approach should be complete enough without going into too much detail, but should provide the basis, in terms of concept and notation, to support the discussion of the remainder of the book. As this chapter can be considered as a general introduction to underwater sound, it synthesizes various textbooks and presents the information in the context of PAM, covering the following subjects: