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Related Experiment Video

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

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Published on: April 1, 2020

Optimal localization by pointing off axis.

Yossi Yovel1, Ben Falk, Cynthia F Moss

  • 1Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.

Science (New York, N.Y.)
|February 6, 2010
PubMed
Summary
This summary is machine-generated.

Echolocating bats do not center sonar beams on targets for localization. Instead, they aim the beam's edge, optimizing spatial tracking and localization accuracy in their sensory perception.

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Area of Science:

  • Sensory neuroscience
  • Bioacoustics
  • Animal behavior

Background:

  • Optimal strategies for stimulus localization and tracking are crucial across sensory modalities.
  • Previous assumptions suggested centering stimuli within the sensory field is optimal.

Purpose of the Study:

  • To experimentally and computationally investigate if centering stimuli is optimal for localization and tracking.
  • To determine the echolocating Egyptian fruit bat's strategy for target localization.

Main Methods:

  • Training Egyptian fruit bats to localize targets using echolocation in complete darkness.
  • Measuring the directional aim of the bats' sonar clicks.
  • Utilizing information-theoretic calculations to assess optimality.

Main Results:

  • Bats did not center sonar beams on targets; they aimed off-axis.
  • The maximum slope (edge) of the sonar beam was directed onto the target.
  • This 'edge' strategy was found to be optimal for localization, albeit at a cost to detection.

Conclusions:

  • Centering stimuli is not an optimal strategy for spatial localization and tracking.
  • A fundamental tradeoff exists between stimulus detection and localization accuracy.
  • This tradeoff, optimized by using maximum signal slope, is likely applicable to hearing, olfaction, and vision.