The Perception of Complex Echoes by an Echolocating Dolphin
Dolphins echolocate with short transient broadband acoustic signals having time-resolution constants between 12 and 15 μs (Au, 1980). Received echoes are often complex and considerably longer in duration than the transmitted signal, having many resolvable highlights or echo components. Echo highlights come from signal reflection at external and internal boundaries of a target and from the presence of different propagational modes within a target. The purpose of this study was to investigate how dolphins perceive and characterize the strength of complex echoes.
KeywordsEnergy Detector Target Present Trial Target Absent Trial Critical Interval Absent Trial
Unable to display preview. Download preview PDF.
- Vel’mín, V.A., and Dubrovskiy, N.A., 1976, The Critical Interval of Active Hearing in Dolphins, Sov. Phys. Acoust., 2: 351–352.Google Scholar