| Effects of noise bandwidth on the late-potential masking level difference. | |
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MedLine Citation:
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PMID: 1372230 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The masking level difference (MLD) is a psychoacoustic phenomenon derived from the subtraction of S pi No thresholds (signals pi radians out of phase and noise in phase at the two ears) from SoNo thresholds (signals and noise in phase at the two ears). The purpose of this study was to determine if the MLD derived from the late components (P1, N1, P2, N2) of the auditory evoked potentials was a physiological correlate of the behavioral MLD. Subjects were 15 young adults with normal hearing. Comparisons were made between behavioral and late potential thresholds to 500 Hz stimuli in So and S pi conditions in quiet, and to 500 Hz stimuli in SoNo and S pi No conditions in narrow band (50 Hz) and wide band (600 Hz) noise. No significant differences were seen for behavioral or late-potential thresholds to So and S pi conditions. The S pi No thresholds was significantly lower than the SoNo threshold, yielding an MLD for both the behavioral and physiological responses. The magnitudes of both the behavioral and late-potential MLD were larger with the narrow band noise than with the wide band noise. Evidence, therefore, is provided that the late-potential MLD reflects similar processes as are responsible for the behavioral MLD. |
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Authors:
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C G Fowler; C M Mikami |
Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Electroencephalography and clinical neurophysiology Volume: 84 ISSN: 0013-4694 ISO Abbreviation: Electroencephalogr Clin Neurophysiol Publication Date: 1992 Mar-Apr |
Date Detail:
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Created Date: 1992-04-21 Completed Date: 1992-04-21 Revised Date: 2008-09-09 |
Medline Journal Info:
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Nlm Unique ID: 0375035 Medline TA: Electroencephalogr Clin Neurophysiol Country: IRELAND |
Other Details:
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Languages: eng Pagination: 157-63 Citation Subset: IM |
Affiliation:
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Veterans Administration Medical Center, Long Beach, CA 90822. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Analysis of Variance Auditory Threshold / physiology Behavior / physiology Electroencephalography Evoked Potentials, Auditory / physiology* Humans Noise* Perceptual Masking / physiology* Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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