Three-Dimensional Reconstructions of the Dolphin EAR

  • Darlene R. Ketten
  • Douglas Wartzok
Part of the NATO ASI Series book series (NSSA, volume 196)


The umwelt or perceptual world of odontocetes is largely defined by acoustic cues imperceptible to humans. Like bats, they use ultrasonic frequencies to echolocate. To penetrate this acoustic world, we must use indirect anatomical and psychophysical techniques. While bat research has incorporated anatomy and physiology to describe neural processing of echolocation signals, cetacean research, hampered by practical and legal restrictions, depends largely upon spectral and temporal analyses of emitted sounds coupled with behavioral observations. From these investigations, we have gained considerable information about the psycho-acoustics of dolphin echolocation, but we still know little about the receptor anatomy.


Basilar Membrane Spiral Ganglion Basal Turn Spiral Ligament Tectorial Membrane 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Darlene R. Ketten
    • 1
  • Douglas Wartzok
    • 2
  1. 1.Department of Otology and LaryngologyHarvard Medical SchoolBostonUSA
  2. 2.Department of Biological SciencesPurdue UniversityFort WayneUSA

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