Further Development and New Concepts for Bionic Sonar. Volume 3. New Concepts and Experiments.

Abstract : This report documents theoretical studies of models for echolocation signal processing of dolphins and the testing of the effectiveness of these models for detecting and classifying small objects in introduced noise and reverberation. This volume investigates potential uses of binaural (two-receiver) sonar systems. The effective beamwidth for a two-receiver array is computed by using a range ambiguity function. Effective beamwidth decreases as array size and bandwidth increase, so a trade-off can be made between array size and bandwidth. Binaural systems may also be used to estimate cross-range velocity. Expected error for velocity estimation is computed for surveying certain range, bandwidth, receiver separation and SNR parameters. (Author)