Contributing Factors
The acoustic signature is made up of a number of individual elements. These include:
- Machinery noise: noise generated by a ship's engines, propeller shafts, fuel pumps, air conditioning systems, etc.
- Cavitation noise: noise generated by the creation of gas bubbles by the turning of a ship's propellers.
- Hydrodynamic noise: noise generated by the movement of water displaced by the hull of a moving vessel.
These emissions depend on a hull's dimensions, the installed machinery and ship's displacement. Therefore different ship classes will have different combinations of acoustic signals that together form a unique signature.
Read more about this topic: Acoustic Signature
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