Bottlenose dolphin(Tursiops truncatus)detection of simulated echoes from normal and time-reversed clicks
| Autor: | Megan Tormey, Arial Brewer, Kimberly Bakhtiari, Nancy Borror, James J. Finneran, Teri Wu, Amy Black |
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| Rok vydání: | 2013 |
| Předmět: |
Male
Sound Spectrography Time Factors Acoustics and Ultrasonics Computer science Bioacoustics Acoustics Sonar Imaging phantom Arts and Humanities (miscellaneous) Animals Computer Simulation biology Pulse (signal processing) Matched filter Echo (computing) Signal Processing Computer-Assisted Bottlenose dolphin biology.organism_classification Object detection Bottle-Nosed Dolphin Echolocation Pattern Recognition Physiological Auditory Perception Female Vocalization Animal human activities Psychoacoustics |
| Zdroj: | The Journal of the Acoustical Society of America. 134:4548-4555 |
| ISSN: | 0001-4966 |
| Popis: | In matched filter processing, a stored template of the emitted sonar pulse is compared to echoes to locate individual replicas of the emitted pulse embedded in the echo stream. A number of experiments with bats have suggested that bats utilize matched filter processing for target ranging, but not for target detection. For dolphins, the few available data suggest that dolphins do not utilize matched filter processing. In this study, the effect of time-reversing a dolphin's emitted click was investigated. If the dolphin relied upon matched filter processing, time-reversal of the click would be expected to reduce the correlation between the (unaltered) click and the echoes and therefore lower detection performance. Two bottlenose dolphins were trained to perform a phantom echo detection task. On a small percentage of trials ("probe trials"), a dolphin's emitted click was time-reversed before interacting with the phantom echo system. Data from the normal and time-reversed trials were then analyzed and compared. There were no significant differences in detection performance or click emissions between the normal and time-reversed conditions for either subject, suggesting that the dolphins did not utilize matched filter processing for this echo detection task. |
| Databáze: | OpenAIRE |
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