| Auditory N1 component to gaps in continuous narrowband noises. | |
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MedLine Citation:
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PMID: 19675460 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: To determine whether (1) the auditory N1 component can be elicited to gaps in continuous narrowband noises, (2) psychophysical and electrophysiological gap thresholds (PGTs and EGTs) are similar to one another, and (3) EGTs are the same for all narrowband noise center frequencies. DESIGN: PGTs and EGTs were obtained from 18 normal-hearing young-adult listeners to gaps in continuous narrowband noises with center frequencies of 0.5, 1, or 4 kHz. PGTs were obtained with a modified B??k??sy-type tracking paradigm, whereas EGTs were obtained to 2-, 5-, 10-, 20-, or 50-msec gaps presented every 2.2 sec. RESULTS: (1) The auditory N1 component was recorded to gaps in narrowband noises, although they appeared morphologically different from cortical potentials obtained using the continuous broadband noise. (2) At center frequencies of 1 and 4 kHz, psychometric functions revealed close similarity between PGTs and EGTs. However, different results were present for the 0.5-kHz narrowband noise, attributed to stimulus artifact. (3) EGTs were approximately 10 msec for most participants at 1 and 4 kHz, but 20 msec at 0.5 kHz, corroborating other studies showing increases in gap threshold with lower center frequencies. CONCLUSIONS: The auditory N1 component can be recorded to gaps in continuous narrowband noises whose gap thresholds are grossly similar to those obtained psychophysically. The differences found between PGTs and EGTs with different narrowband noise center frequencies call for further investigation of narrowband noise stimuli for the study of temporal resolution. |
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Authors:
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Samuel R Atcherson; Herbert Jay Gould; Maurice I Mendel; Corrina A Ethington |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ear and hearing Volume: 30 ISSN: 1538-4667 ISO Abbreviation: Ear Hear Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-10-28 Completed Date: 2010-01-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8005585 Medline TA: Ear Hear Country: United States |
Other Details:
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Languages: eng Pagination: 687-95 Citation Subset: IM |
Affiliation:
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Department of Audiology and Speech Pathology, University of Arkansas at Little Rock, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72204, USA. sratcherson@ualr.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adolescent Adult Attention / physiology* Audiometry, Pure-Tone Auditory Cortex / physiology Auditory Perception / physiology* Auditory Threshold / physiology Electroencephalography Evoked Potentials, Auditory / physiology* Female Humans Male Pitch Perception / physiology Psychoacoustics Reaction Time / physiology Signal Processing, Computer-Assisted Sound Spectrography Time Perception / physiology* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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