Speech recognition by bilateral cochlear implant users in a cocktail-party setting

Philipos C. Loizou, Yi Hu, Ruth Litovsky, Gongqiang Yu, Robert Peters, Jennifer Lake, Peter Roland

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)372-383
Number of pages12
JournalJournal of the Acoustical Society of America
Volume125
Issue number1
DOIs
StatePublished - 2009

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speech recognition
cues
ear
hearing
masking
interactions
thresholds
Cochlear Implant
Speech Recognition
configurations
Interaction

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Loizou, P. C., Hu, Y., Litovsky, R., Yu, G., Peters, R., Lake, J., & Roland, P. (2009). Speech recognition by bilateral cochlear implant users in a cocktail-party setting. Journal of the Acoustical Society of America, 125(1), 372-383. https://doi.org/10.1121/1.3036175

Speech recognition by bilateral cochlear implant users in a cocktail-party setting. / Loizou, Philipos C.; Hu, Yi; Litovsky, Ruth; Yu, Gongqiang; Peters, Robert; Lake, Jennifer; Roland, Peter.

In: Journal of the Acoustical Society of America, Vol. 125, No. 1, 2009, p. 372-383.

Research output: Contribution to journalArticle

Loizou, PC, Hu, Y, Litovsky, R, Yu, G, Peters, R, Lake, J & Roland, P 2009, 'Speech recognition by bilateral cochlear implant users in a cocktail-party setting', Journal of the Acoustical Society of America, vol. 125, no. 1, pp. 372-383. https://doi.org/10.1121/1.3036175
Loizou, Philipos C. ; Hu, Yi ; Litovsky, Ruth ; Yu, Gongqiang ; Peters, Robert ; Lake, Jennifer ; Roland, Peter. / Speech recognition by bilateral cochlear implant users in a cocktail-party setting. In: Journal of the Acoustical Society of America. 2009 ; Vol. 125, No. 1. pp. 372-383.
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