Classification of biosonar target echoes based on coarse and fine spectral features in the bottlenose dolphin (Tursiops truncatus)
Abstract
Previous bottlenose dolphin studies suggest that the coarse envelope of an echo spectrum (“macrostructure”) has hierarchical dominance over finer-scale spectral features (“microstructure”) during synthetic echo discrimination tasks. In this study, two dolphins listened to and discriminated between underwater sound stimuli consisting of pairs of clicks with different micro- and macrostructures. After conditioning dolphins to reliably discriminate between two “anchor” stimuli with different micro- and macrostructures, probe stimuli, which contained a macrostructure identical to one of the anchor stimuli and the microstructure of the alternate anchor, were infrequently presented. Dolphins responded to probes in a manner consistent with macrostructure primacy.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 01, 2020
- Source ID
- 10.1121/10.0001976
Entities
People
- Alyssa W. Accomando
- Dorian S. Houser
- James J Finneran
- Jason Mulsow
Organizations
- National Marine Mammal Foundation
- Office of Naval Research
- United States Navy