ArticleeNeuro
Combination of Interaural Level and Time Difference in Azimuthal Sound Localization in Owls.
Article in eNeuro. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 18 citations in OpenAlex.
- 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 · 2025Article
- Development of the horizontal optocollic reflex in juvenile barn owls (Tyto furcata pratincola).Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2022Article
- Azimuthal sound localization in the chicken.PloS one · 2022Article
- Barn Owl's Auditory Space Map Activity Matching Conditions for a Population Vector Readout to Drive Adaptive Sound-Localizing Behavior.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2021Article
- Sound localization in barn owls studied with manipulated head-related transfer functions: beyond broadband interaural time and level differences.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2020Article
- The barn owls' Minimum Audible Angle.PloS one · 2019Article
- Interaction of interaural cues and their contribution to the lateralisation of Mongolian gerbils (Meriones unguiculatus).Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2018Article
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A function of the auditory system is to accurately determine the location of a sound source. The main cues for sound location are interaural time (ITD) and level (ILD) differences. Humans use both ITD and ILD to determine the azimuth. Thus far, the conception of sound localization in barn owls was that their facial ruff and asymmetrical ears generate a two-dimensional grid of ITD for azimuth and ILD for elevation. We show that barn owls also use ILD for azimuthal sound localization when ITDs are ambiguous. For high-frequency narrowband sounds, midbrain neurons can signal multiple locations, leading to the perception of an auditory illusion called a phantom source. Owls respond to such an illusory percept by orienting toward it instead of the true source. Acoustical measurements close to the eardrum reveal a small ILD component that changes with azimuth, suggesting that ITD and ILD information could be combined to eliminate the illusion. Our behavioral data confirm that perception was robust against ambiguities if ITD and ILD information was combined. Electrophysiological recordings of ILD sensitivity in the owl's midbrain support the behavioral findings indicating that rival brain hemispheres drive the decision to orient to either true or phantom sources. Thus, the basis for disambiguation, and reliable detection of sound source azimuth, relies on similar cues across species as similar response to combinations of ILD and narrowband ITD has been observed in humans.
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