Effects of compression channel number and linked compression on masked lateralization performance in simulated bilateral cochlear implant listening

2015 ◽  
Vol 137 (4) ◽  
pp. 2227-2227
Author(s):  
Nathaniel Spencer ◽  
Christopher Brown
Keyword(s):  
Cochlear Implant ◽  
Channel Number ◽  
Bilateral Cochlear Implant ◽  
Lateralization Performance

scholarly journals Improving Localization and Speech Reception in Noise for Bilateral Cochlear Implant Recipients

2019 ◽  
Vol 23 ◽  
pp. 233121651983149 ◽  
Author(s):  
Wendy B. Potts ◽  
Lakshmish Ramanna ◽  
Trevor Perry ◽  
Christopher J. Long
Keyword(s):  
Cochlear Implant ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Interaural Level Difference ◽  
Mean Square ◽  
Localization Accuracy ◽  
Speech In Noise ◽  
Speech Reception ◽  
Bilateral Cochlear Implant ◽  
Comparative Survey

This study looked at different methods to preserve interaural level difference (ILD) cues for bilateral cochlear implant (BiCI) recipients. One possible distortion to ILD is from automatic gain control (AGC). Localization accuracy of BiCI recipients using default versus increased AGC threshold and linked AGCs versus independent AGCs was examined. In addition, speech reception in noise was assessed using linked versus independent AGCs and enabling and disabling Autosensitivity™ Control. Subjective information via a diary and questionnaire was also collected about maps with linked and independent AGCs during a take-home experience. Localization accuracy improved in the increased AGC threshold and the linked AGCs conditions. Increasing the AGC threshold resulted in a 4° improvement in root mean square error averaged across all speaker locations. Using linked AGCs, BiCI participants experienced an 8° improvement for all speaker locations and a 19° improvement at the speaker location most affected by the AGC. Speech reception threshold in noise improved by an average of 2.5 dB when using linked AGCs versus independent AGCs. In addition, the effect of linked AGCs on speech in noise was compared with that of Autosensitivity™ Control. The Speech, Spatial, and Qualities of Hearing Scale-12 question comparative survey showed an improvement when using maps with linked AGCs. These findings support the hypothesis that ILD cues may be preserved by increasing the AGC threshold or linking AGCs.

scholarly journals Binaural integration abilities in bilateral cochlear implant user

2015 ◽  
Vol 10 (4) ◽  
pp. 150-153 ◽  
Author(s):  
Chie Obuchi ◽  
Masae Shiroma ◽  
Sayaka Ogane ◽  
Kimitaka Kaga
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implant User ◽  
Bilateral Cochlear Implant

Shared monaural and binaural temporal processing limits in bilateral cochlear implant listeners

2016 ◽  
Vol 139 (4) ◽  
pp. 2210-2210
Author(s):  
Antje Ihlefeld ◽  
Robert P. Carlyon ◽  
Alan Kan ◽  
Tyler H. Churchill ◽  
Ruth Y. Litovsky
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Bilateral Cochlear Implant
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