| Analysis of spectral shape in the barn owl auditory system. | |
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MedLine Citation:
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PMID: 16001185 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In a behavioral experiment, we investigated how efficiently barn owls (Tyto alba) could detect changes in the spectral profile of multi-component auditory signals with stochastic envelope patterns. Signals consisted of one or five bands of noise (bandwidth 4, 16, or 64 Hz each; center frequencies 1.02, 1.43, 2.0, 2.8, 3.92 kHz). We determined increment thresholds for the 2 kHz component for three conditions: single-band condition (only the 2 kHz component), all five noise bands with the envelope fluctuations of the bands being either correlated or uncorrelated. Noise bandwidth had no significant effect on increment detection. Increment thresholds for the different conditions, however, differed significantly. Thresholds in correlated conditions were generally the lowest of all conditions, whereas, thresholds in uncorrelated conditions mostly resulted in the highest thresholds. This can be interpreted as evidence for comodulation masking release in barn owls. If the increment in the 2 kHz component is balanced by decrementing the four flanking bands in amplitude, increment detection thresholds are not affected. The data suggest that the barn owls used information from simultaneous spectral comparison across different frequency channels to detect spectral changes in multi-component noise signals rather than sequential comparison of overall stimulus levels. |
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Authors:
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U Langemann; M A Zokoll; G M Klump |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-09-29 |
Journal Detail:
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Title: Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology Volume: 191 ISSN: 0340-7594 ISO Abbreviation: J. Comp. Physiol. A Neuroethol. Sens. Neural. Behav. Physiol. Publication Date: 2005 Oct |
Date Detail:
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Created Date: 2005-10-06 Completed Date: 2005-12-07 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 101141792 Medline TA: J Comp Physiol A Neuroethol Sens Neural Behav Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 889-901 Citation Subset: IM |
Affiliation:
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Institut für Biologie und Umweltwissenschaften, Fakultät V, Universität Oldenburg, Germany. ulrike.langemann@uni-oldenburg.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Analysis of Variance Animals Auditory Threshold / physiology Behavior, Animal / physiology Data Interpretation, Statistical Discrimination (Psychology) Hearing / physiology* Loudness Perception / physiology Stochastic Processes Strigiformes / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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