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Related Experiment Videos

Auditory spatial discrimination by barn owls in simulated echoic conditions.

Matthew W Spitzer1, Avinash D S Bala, Terry T Takahashi

  • 1Institute of Neuroscience, University of Oregon, Eugene, Oregon 97403, USA. spitzer@uoneuro.uoregon.edu

The Journal of the Acoustical Society of America
|March 27, 2003
PubMed
Summary

Barn owls exhibit a precedence effect similar to humans, where leading sounds influence sound localization more than lagging sounds. This study quantifies this effect in owls using pupillary responses.

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Neural Responses Underlying Interaural Time Difference Discrimination as a Function of Sensory Reliability in the Barn Owl.

The Journal of neuroscience : the official journal of the Society for Neuroscience·2025

Area of Science:

  • Auditory Neuroscience
  • Animal Behavior
  • Psychoacoustics

Background:

  • Directional hearing in reverberant environments is challenging.
  • The precedence effect in humans prioritizes leading sound cues for location perception.
  • Evidence suggests precedence phenomena exist across various species.

Purpose of the Study:

  • To quantitatively measure precedence effect phenomena in barn owls.
  • To compare owl spatial discrimination abilities for leading vs. lagging sound sources.
  • To investigate the role of binaural cues in the owl's precedence effect.

Main Methods:

  • Utilized a habituation/recovery paradigm based on pupillary dilation response.
  • Employed a sound discrimination task to assess spatial localization.

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  • Conducted a control experiment to rule out monaural cue influence.

    • Main Results:

    • Owl's discrimination of lagging sound source location was impaired compared to single sources.
    • Spatial discrimination of leading sound sources was also impaired, but less so than lagging sources.
    • Results suggest reduced sensitivity to binaural directional information in two-source conditions.

    Conclusions:

    • Barn owls demonstrate a precedence effect analogous to humans.
    • This similarity provides a foundation for comparing behavioral and neural data on sound localization.
    • The study highlights shared mechanisms of auditory spatial processing across species.