A Tutorial on Underwater Acoustic Imaging

Abstract

The purpose of underwater acoustic imaging is to produce two dimensional images of underwater objects that are somehow recognizable, or at least useful. Underwater acoustic imaging systems are generally useful for either classifying objects or observing the details of objects, usually from some form of underwater vehicle. For example, acoustic imaging systems are useful in differentiating mines from rocks, coral heads, and garbage on the ocean bottom, and in general, differentiating between objects that warrant further investigation and the many uninteresting objects that are in the ocean. Acoustic imaging systems are also useful for inspecting or examining objects when water turbidity precludes the use of closed circuit television or other optical means of viewing.