Survey of Underwater Audio Communication Systems.

A survey of underwater audio communications systems was conducted to determine what types of systems are currently available and which, if any, system was predominant. In addition, any problem areas that have been encountered in the development of an intelligible system were discussed. The survey indicated that the three types of systems that are currently feasible are hard wire, acoustic carrier, and direct audio communication systems. The survey also indicated that no one system is predominantly more intelligible than the others and that expanded research is necessary to develop an effective underwater communication system.