Preliminary Report on Classification of Transient Sonar Signals

摘要

We extracted fifty, one-second segments from extended recordings of underwater acoustic events. Using transcripts of the recording sessions and the judgments of two sonar operators, each of these fifty signals was put into one of eight categories. We then measured two listeners'; abilities to categorize these fifty signals presented individually. Feedback was given for three exemplars from each of the eight categories. The other twenty-six signals were used as probe stimuli to test listeners' abilities to generalize the category to other stimuli for which they did not receive feedback. Listeners performed quite well on the task. They attained 98.0% correct judgements on the patterns of errors. Finally, we report anecdotal evidence concerning the role of attentional processes in the classification of these stimuli. The results suggest that this stimulus set and classification task is appropriate for further testing to determine stimulus features and attentional processes underlying aural classification. (rh)