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Partial Learning in Human Sound Localization With Asymmetric Ears.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Partial Learning in Human Sound Localization With Asymmetric Ears.
Συγγραφείς: Bremen P; Department of Neuroscience, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands., van der Willigen RF; Research Centre Innovations in Care, Data Supported Healthcare: Data-Science Unit, Rotterdam University of Applied Sciences, Rotterdam, the Netherlands.; School of Communication, Media and Information Technology, Rotterdam University of Applied Sciences, Rotterdam, the Netherlands.; Centre of Expertise HRTech, Rotterdam University of Applied Sciences, Rotterdam, the Netherlands., van Opstal AJ; Donders Institute for Brain, Cognition and Behaviour, Donders Centre for Neuroscience, Section Neurophysics, Radboud University, Nijmegen, the Netherlands., van Wanrooij MM; Donders Institute for Brain, Cognition and Behaviour, Donders Centre for Neuroscience, Section Neurobiology, Radboud University, Nijmegen, the Netherlands.
Πηγή: The European journal of neuroscience [Eur J Neurosci] 2026 Sep; Vol. 64 (6), pp. e70685.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Wiley-Blackwell Country of Publication: France NLM ID: 8918110 Publication Model: Print Cited Medium: Internet ISSN: 1460-9568 (Electronic) Linking ISSN: 0953816X NLM ISO Abbreviation: Eur J Neurosci Subsets: MEDLINE
Imprint Name(s): Publication: : Oxford : Wiley-Blackwell
Original Publication: Oxford, UK : Published on behalf of the European Neuroscience Association by Oxford University Press, c1989-
Ιατρικοί όροι (MeSH): Sound Localization*/physiology , Learning*/physiology , Ear*/physiology, Humans ; Female ; Male ; Adult ; Cues ; Acoustic Stimulation ; Young Adult
Περίληψη: The brain computes sound location from auditory spatial cues. Humans and barn owls both localize sounds accurately, yet they rely on fundamentally different cue configurations shaped by their ear anatomy and neural circuitry. In humans, symmetrical ears provide interaural time and level differences (ITD and ILD) for horizontal localization, while vertical localization depends primarily on high-frequency, monaural spectral cues generated by the pinnae. Barn owls, by contrast, possess asymmetrical ears and use binaural cues for both azimuth and elevation. Because auditory pathways are tuned to species-specific cue statistics, it remains unclear whether humans can adapt when binaural level cues are also made informative about elevation. We tested this by fitting human listeners with asymmetric ear molds that disrupted normal spectral cues, introduced elevation-dependent ILDs, and left ITDs unaffected. Participants wore the molds during daily life and were tested with broadband, high-pass, and low-pass noise bursts. Acute mold exposure severely degraded elevation localization, whereas horizontal localization remained largely unaffected. With prolonged exposure, elevation localization improved, but adaptation was limited, variable across listeners, and fluctuated across sessions. Improvement was strongest for broadband sounds. Because broadband and high-pass sounds both contained high-frequency information, this broadband advantage cannot be explained by access to additional spectral cues alone. Instead, it suggests that low-frequency ITDs helped listeners exploit the altered binaural cue structure, including the elevation-dependent ILDs introduced by the molds. These findings show that humans can partially adapt to asymmetric outer-ear acoustics when complementary spatial cues help resolve ambiguity in the altered cue structure.
(© 2026 The Author(s). European Journal of Neuroscience published by Federation of European Neuroscience Societies and John Wiley & Sons Ltd.)
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Grant Information: MEST-CT-2004-007825 Sixth Framework Programme; 865.05.003 The Netherlands Organization for Scientific Research
Contributed Indexing: Keywords: adaptation; hearing; humans; psychophysics; sound localization
Entry Date(s): Date Created: 20260926 Date Completed: 20260926 Latest Revision: 20260928
Update Code: 20260928
PubMed Central ID: PMC13615357
DOI: 10.1111/ejn.70685
PMID: 42798194
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1460-9568
DOI:10.1111/ejn.70685