| Difference in precedence effect between children and adults signifies development of sound localization abilities in complex listening tasks. | |
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MedLine Citation:
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PMID: 20968369 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The precedence effect refers to the fact that humans are able to localize sound in reverberant environments, because the auditory system assigns greater weight to the direct sound (lead) than the later-arriving sound (lag). In this study, absolute sound localization was studied for single source stimuli and for dual source lead-lag stimuli in 4-5 year old children and adults. Lead-lag delays ranged from 5-100 ms. Testing was conducted in free field, with pink noise bursts emitted from loudspeakers positioned on a horizontal arc in the frontal field. Listeners indicated how many sounds were heard and the perceived location of the first- and second-heard sounds. Results suggest that at short delays (up to 10 ms), the lead dominates sound localization strongly at both ages, and localization errors are similar to those with single-source stimuli. At longer delays errors can be large, stemming from over-integration of the lead and lag, interchanging of perceived locations of the first-heard and second-heard sounds due to temporal order confusion, and dominance of the lead over the lag. The errors are greater for children than adults. Results are discussed in the context of maturation of auditory and non-auditory factors. |
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Authors:
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Ruth Y Litovsky; Shelly P Godar |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 128 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-10-25 Completed Date: 2011-02-11 Revised Date: 2012-05-07 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1979-91 Citation Subset: IM |
Affiliation:
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Waisman Center, University of Wisconsin, 1500 Highland Avenue, Madison, Wisconsin 53705, USA. litovsky@waisman.wisc.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Acoustics / instrumentation Adult Age Factors Amplifiers, Electronic Audiometry, Pure-Tone Auditory Pathways / physiology* Auditory Perception* Auditory Threshold Child, Preschool Female Humans Male Psychoacoustics Signal Detection, Psychological* Sound Localization* Time Factors Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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5P30HD003352/HD/NICHD NIH HHS; 5R01DC008365/DC/NIDCD NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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