| Estimating the contribution of non-sensory factors to infant-adult differences in behavioral thresholds. | |
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MedLine Citation:
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PMID: 8647727 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Estimates of behavioral thresholds of infants are elevated relative to those of adults. Explanations for the differences include auditory sensory factors and non-sensory factors, but no direct estimates of the relative contributions of these two factors have been made. In this investigation, thresholds in quiet and in increasing levels of a masking noise for a 1 kHz tone, in infants 8 to 11 months old and in adults, were determined. The infant-adult differences in unmasked threshold was compared to the infant-adult difference in an estimate of the minimum masking level (MML) that was derived from the masking data. The intensity level of a masking noise at which masking begins is assumed to be independent of the non-sensory factors that impact on the threshold value itself. Therefore, it is reasoned that the infant-adult difference in MML reflects more closely differences in auditory sensory factors than does the infant-adult difference in unmasked threshold. In the region of 1 kHz, the infant-adult difference in behavioral threshold was 12 dB and the infant-adult difference in MML was 8 dB. Therefore, according to our assumptions, 8 dB of the infant-adult difference in unmasked threshold is accounted for by sensory factors and the remaining 4 dB must be attributable to non-sensory factors. |
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Authors:
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R J Nozza |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Hearing research Volume: 91 ISSN: 0378-5955 ISO Abbreviation: Hear. Res. Publication Date: 1995 Nov |
Date Detail:
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Created Date: 1996-07-19 Completed Date: 1996-07-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7900445 Medline TA: Hear Res Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 72-8 Citation Subset: IM |
Affiliation:
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Department of Communication Sciences and Disorders, University of Georgia, Athens 30602-7152, USA. bnozza@moe.coe.uga.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adolescent Adult Aging / physiology* Auditory Threshold / physiology* Computer Simulation Ear Canal / physiology Female Humans Infant Infant Behavior* Male Models, Biological Perceptual Masking Psychomotor Performance / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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