Document Detail


Effect of stimulus level and place of stimulation on temporal pitch perception by cochlear implant users.
MedLine Citation:
PMID:  21117749     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Three experiments studied the effect of pulse rate on temporal pitch perception by cochlear implant users. Experiment 1 measured rate discrimination for pulse trains presented in bipolar mode to either an apical, middle, or basal electrode and for standard rates of 100 and 200 pps. In each block of trials the signals could have a level of -0.35, 0, or +0.35 dB re the standard, and performance for each signal level was recorded separately. Signal level affected performance for just over half of the combinations of subject, electrode, and standard rate studied. Performance was usually, but not always, better at the higher signal level. Experiment 2 showed that, for a given subject and condition, the direction of the effect was similar in monopolar and bipolar mode. Experiment 3 employed a pitch comparison procedure without feedback, and showed that the signal levels in experiment 1 that produced the best performance for a given subject and condition also led to the signal having a higher pitch. It is concluded that small level differences can have a robust and substantial effect on pitch judgments and argue that these effects are not entirely due to response biases or to co-variation of place-of-excitation with level.
Authors:
Robert P Carlyon; Catherine Lynch; John M Deeks
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  127     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-12-01     Completed Date:  2011-03-21     Revised Date:  2014-02-20    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2997-3008     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation
Adult
Aged
Auditory Threshold
Cochlear Implantation / instrumentation*
Cochlear Implants*
Correction of Hearing Impairment / psychology*
Discrimination (Psychology)
Humans
Loudness Perception
Middle Aged
Pitch Perception*
Signal Processing, Computer-Assisted
Time Factors
Time Perception*
Grant Support
ID/Acronym/Agency:
MC_U105559842//Medical Research Council

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


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