Document Detail


Speech recognition by bilateral cochlear implant users in a cocktail-party setting.
MedLine Citation:
PMID:  19173424     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Unlike prior studies with bilateral cochlear implant users which considered only one interferer, the present study considered realistic listening situations wherein multiple interferers were present and in some cases originating from both hemifields. Speech reception thresholds were measured in bilateral users unilaterally and bilaterally in four different spatial configurations, with one and three interferers consisting of modulated noise or competing talkers. The data were analyzed in terms of binaural benefits including monaural advantage (better-ear listening) and binaural interaction. The total advantage (overall spatial release) received was 2-5 dB and was maintained with multiple interferers present. This advantage was dominated by the monaural advantage, which ranged from 1 to 6 dB and was largest when the interferers were mostly energetic. No binaural-interaction benefit was found in the present study with either type of interferer (speech or noise). While the total and monaural advantage obtained for noise interferers was comparable to that attained by normal-hearing listeners, it was considerably lower for speech interferers. This suggests that bilateral users are less capable of taking advantage of binaural cues, in particular, under conditions of informational masking. Furthermore, the use of noise interferers does not adequately reflect the difficulties experienced by bilateral users in real-life situations.
Authors:
Philipos C Loizou; Yi Hu; Ruth Litovsky; Gongqiang Yu; Robert Peters; Jennifer Lake; Peter Roland
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
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 Jan 
Date Detail:
Created Date:  2009-01-28     Completed Date:  2009-07-13     Revised Date:  2014-09-14    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  372-83     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Cochlear Implants*
Cues
Humans
Middle Aged
Recognition (Psychology)*
Social Environment*
Speech Perception*
Grant Support
ID/Acronym/Agency:
R01 DC003083/DC/NIDCD NIH HHS; R01 DC003083/DC/NIDCD NIH HHS; R01 DC007527/DC/NIDCD NIH HHS; R01 DC007527/DC/NIDCD NIH HHS; R01 DC007527-05/DC/NIDCD NIH HHS
Comments/Corrections

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


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