Document Detail


Effects of reverberation on fusion of lead and lag noise burst stimuli.
MedLine Citation:
PMID:  14698089     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this investigation was to determine the effects of reverberation on the precedence effect by obtaining thresholds for perception of leading and lagging noise burst stimuli as separate auditory events. In Experiment 1, lag burst thresholds for 4-ms noise bursts were measured in a simulated reverberant and anechoic environment for nine subjects with normal hearing at presentation levels of 10, 20, and 30 dB SL. Results indicated that lag burst thresholds obtained in the reverberant environment were higher than those obtained in the anechoic environment, with no effect of sensation level. In Experiment 2, three new stimulus conditions, two monaural and one binaural control, were employed. For one monaural condition, the stimuli were equal in level and for the other, the leading stimulus was more intense than the lagging stimulus. For the binaural control condition, the stimuli were presented from a perceived spatial location of 0 degrees azimuth. In the monaural and binaural control conditions, lag burst thresholds were lower than those obtained in the reverberant environment of Experiment 1. There was no difference between lag burst thresholds obtained in either environment for the monaural and binaural control conditions compared to the anechoic condition of Experiment 1. Results of Experiment 2 indicate that the higher lag burst thresholds observed in Experiment 1 are not fully explained by a peripheral masking effect.
Authors:
Richard A Roberts; Janet Koehnke; Joan Besing
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Hearing research     Volume:  187     ISSN:  0378-5955     ISO Abbreviation:  Hear. Res.     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2003-12-30     Completed Date:  2004-08-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7900445     Medline TA:  Hear Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  73-84     Citation Subset:  IM    
Affiliation:
Department of Communication Sciences and Disorders, University of South Florida, 4202 East Fowler Avenue, PCD 1017, Tampa, FL 33620, USA. rroberts@chuma1.cas.usf.edu
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation / methods*
Adult
Auditory Perception / physiology*
Auditory Threshold*
Humans
Psychometrics
Reference Values
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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