Comparison of Sonar Discrimination by an Echolocating Dolphin and a Counterpropagation Neural Network
Abstract
The capability of an Atlantic bottlenose dolphin to discriminate wall thickness differences of hollow cylinders by echolocation was studied by Au and Pawloski (1992). A standard cylinder of 6.35 cm wall thickness was compared with cylinder shaving wall thickness that differed from the standard + or - 0.2, + or - 0.3, + or - 0.4, and + or - 0.8 mm. All cylinders had an O.D. of 37.85 mm, and a length of 12.7 cm. The standard and a comparison target, separated by an angle of + or - 11 deg, were presented simultaneously at a range of 8 m and the dolphin was required to indicate the location of the standard target. The standard was paired with a different comparison target for ten consecutive trial apiece. The experiment was conducted in the free field and in the presence of broadband masking noise
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1992
- Accession Number
- ADA265890
Entities
Organizations
- Naval Command, Control and Ocean Surveillance Center