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Updated: Jan 24, 2026
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Non-invasive 3D-Visualization with Sub-micron Resolution Using Synchrotron-X-ray-tomography
Published on: May 27, 2008
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The Spatial Resolution of Bat Biosonar Quantified with a Visual-Resolution Paradigm
Cornelia Geberl1, Kathrin Kugler1, Lutz Wiegrebe1
1Division of Neurobiology, Department Biology II, Faculty of Biology, Ludwig-Maximilians-University Munich, Grosshaderner Str. 2, 82152 Martinsried, Germany.
Current Biology : CB
|May 21, 2019
Summary
Bats use biosonar for navigation but have low spatial resolution (80°). They compensate by sequentially scanning their environment, demonstrating that low-resolution perception supports complex behaviors.
Area of Science:
- Neuroscience
- Bioacoustics
- Sensory Ecology
Background:
- Bats exhibit exceptional 3D navigation skills in nocturnal environments using biosonar.
- Unlike vision's high-resolution spatial coding, the bat's inner ear processes frequency and time, not space.
Purpose of the Study:
- To quantify the spatial resolution of bat biosonar using Lord Rayleigh's classical resolution paradigm.
- To compare biosonar spatial resolution with human visual resolution.
Main Methods:
- Recruited Rayleigh's resolution paradigm to assess bat biosonar's ability to resolve multiple reflectors.
- Quantified spatial resolution in the azimuthal plane.
Main Results:
- Bat biosonar exhibits a low spatial resolution in azimuth, approximately 80°.
- This contrasts sharply with human visual resolution, which can be as fine as 0.02°.
Conclusions:
- Bats likely compensate for limited spatial resolution by sequentially probing their surroundings during flight.
- Low-resolution environmental perception can effectively support intelligent behavior in complex settings.
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