Document Detail

Does random temporal jitter reduce onset dominance in temporal weighting functions for high-rate click trains?
MedLine Citation:
PMID:  19354648     Owner:  NLM     Status:  In-Data-Review    
Several studies have noted poor sensitivity to interaural time differences (ITD) among users of bilateral cochlear implants (CIs) compared to normal hearing listeners. One hypothesis for this impairment is that CI users are subject to a higher degree of binaural adaptation-a loss of sensitivity to binaural cues after onset-than normal hearing listeners, as a result of CI electrical stimulation. [Laback and Majdak, PNAS 15, 814-817 (2008)] demonstrated improved ITD discrimination in CI users by imposing random temporal jitter on CI pulse trains bilaterally. A candidate explanation for this improvement is that temporal jitter causes a "restarting" of the adapted binaural system, and, thus, improved sensitivity to ITD after onset. In the present study, temporal weighting functions of normal-hearing listeners were measured for discrimination of ITD and interaural level differences carried by trains of 4000 Hz Gabor clicks. Interclick intervals of 1.25 and 2.5 s were tested with and without additional random temporal jitter. The results have implications for mechanisms of binaural adaptation as well as for binaural performance in CI users.
Andrew D Brown; G Christopher Stecker
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  125     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2522     Citation Subset:  IM    
Dept. of Speech & Hearing Sci. , Univ. of Washington, 1417 NE 42nd St., Seattle, WA 98105,
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