Source localization in a waveguide using a matched‐field technique

The ability to localize a source in a waveguide by correlating measured and predicted acoustic field values at a vertical array of receivers depends at least on (1) the number of dominant acoustic modes that have been adequately sampled and (2) the accuracy of the field predictions. Several attempts to localize sound sources, using experimental and model data for shallow and deep water environments, are discussed. The results of these attempts are presented as well as observations regarding the number of depth/range replica source points required to localize the source for complicated (many modes) versus simple (few modes) acoustic environments. [Work supported by NORDA.]