TY - JOUR
T1 - Using ILD or ITD cues for sound source localization and speech understanding in a complex listening environment by listeners with bilateral and with hearing-preservation cochlear implants
AU - Loiselle, Louise H.
AU - Dorman, Michael
AU - Yost, William
AU - Cook, Sarah J.
AU - Gifford, Rene H.
N1 - Funding Information:
This study was supported by National Institute on Deafness and Other Communications Disorders Grant F31DC011684 (awarded to Louise H. Loiselle) and by the MED-EL Corporation (awarded to Louise H. Loiselle); by National Institutes of Health Grants NIH-R-01-DC-010821 (awarded to Michael F. Dorman), and NIH-R-01-DC-009404 (awarded to Rene H. Gifford); and by the Air Force Office of Scientific Research Grant FA9550-12-1-0312 (awarded to William A. Yost).
Publisher Copyright:
© 2016 American Speech-Language-Hearing Association.
PY - 2016/8
Y1 - 2016/8
N2 - Purpose: To assess the role of interaural time differences and interaural level differences in (a) sound-source localization, and (b) speech understanding in a cocktail party listening environment for listeners with bilateral cochlear implants (CIs) and for listeners with hearing-preservation CIs. Methods: Eleven bilateral listeners with MED-EL (Durham, NC) CIs and 8 listeners with hearing-preservation CIs with symmetrical low frequency, acoustic hearing using the MED-EL or Cochlear device were evaluated using 2 tests designed to task binaural hearing, localization, and a simulated cocktail party. Access to interaural cues for localization was constrained by the use of low-pass, high-pass, and wideband noise stimuli. Results: Sound-source localization accuracy for listeners with bilateral CIs in response to the high-pass noise stimulus and sound-source localization accuracy for the listeners with hearing-preservation CIs in response to the low-pass noise stimulus did not differ significantly. Speech understanding in a cocktail party listening environment improved for all listeners when interaural cues, either interaural time difference or interaural level difference, were available. Conclusions: The findings of the current study indicate that similar degrees of benefit to sound-source localization and speech understanding in complex listening environments are possible with 2 very different rehabilitation strategies: the provision of bilateral CIs and the preservation of hearing.
AB - Purpose: To assess the role of interaural time differences and interaural level differences in (a) sound-source localization, and (b) speech understanding in a cocktail party listening environment for listeners with bilateral cochlear implants (CIs) and for listeners with hearing-preservation CIs. Methods: Eleven bilateral listeners with MED-EL (Durham, NC) CIs and 8 listeners with hearing-preservation CIs with symmetrical low frequency, acoustic hearing using the MED-EL or Cochlear device were evaluated using 2 tests designed to task binaural hearing, localization, and a simulated cocktail party. Access to interaural cues for localization was constrained by the use of low-pass, high-pass, and wideband noise stimuli. Results: Sound-source localization accuracy for listeners with bilateral CIs in response to the high-pass noise stimulus and sound-source localization accuracy for the listeners with hearing-preservation CIs in response to the low-pass noise stimulus did not differ significantly. Speech understanding in a cocktail party listening environment improved for all listeners when interaural cues, either interaural time difference or interaural level difference, were available. Conclusions: The findings of the current study indicate that similar degrees of benefit to sound-source localization and speech understanding in complex listening environments are possible with 2 very different rehabilitation strategies: the provision of bilateral CIs and the preservation of hearing.
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U2 - 10.1044/2015_JSLHR-H-14-0355
DO - 10.1044/2015_JSLHR-H-14-0355
M3 - Article
C2 - 27411035
AN - SCOPUS:84984618913
SN - 1092-4388
VL - 59
SP - 810
EP - 818
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
IS - 4
ER -