The impact of asymmetric rates on interaural time difference lateralization and auditory object formation in bilateral cochlear implant and normal hearing listeners

2017 ◽  
Vol 141 (5) ◽  
pp. 3635-3635
Author(s):  
Tanvi D. Thakkar ◽  
Alan Kan ◽  
Ruth Litovsky
Keyword(s):  
Cochlear Implant ◽  
Interaural Time Difference ◽  
Normal Hearing ◽  
Time Difference ◽  
Bilateral Cochlear Implant ◽  
Auditory Object ◽  
The Impact

scholarly journals Effect of Channel Envelope Synchrony on Interaural Time Difference Sensitivity in Bilateral Cochlear Implant Listeners

2015 ◽  
Vol 36 (4) ◽  
pp. e199-e206 ◽  
Author(s):  
Tom Francart ◽  
Anneke Lenssen ◽  
Andreas Büchner ◽  
Thomas Lenarz ◽  
Jan Wouters
Keyword(s):  
Cochlear Implant ◽  
Interaural Time Difference ◽  
Time Difference ◽  
Bilateral Cochlear Implant

Does electrode placement affect the interaural-time-difference acuity in bilateral cochlear-implant listeners?

2018 ◽  
Vol 144 (3) ◽  
pp. 1710-1710
Author(s):  
Olga A. Stakhovskaya ◽  
Joshua G. Bernstein ◽  
Jack H. Noble ◽  
Kenneth K. Jensen ◽  
Michael Hoa ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Interaural Time Difference ◽  
Time Difference ◽  
Electrode Placement ◽  
Bilateral Cochlear Implant

scholarly journals Interaural Time-Difference Discrimination as a Measure of Place of Stimulation for Cochlear-Implant Users With Single-Sided Deafness

2018 ◽  
Vol 22 ◽  
pp. 233121651876551 ◽  
Author(s):  
Joshua G. W. Bernstein ◽  
Olga A. Stakhovskaya ◽  
Gerald I. Schuchman ◽  
Kenneth K. Jensen ◽  
Matthew J. Goupell
Keyword(s):  
Cochlear Implant ◽  
Interaural Time Difference ◽  
Time Difference ◽  
Single Sided Deafness

scholarly journals Cochlear Implant: Effect of the Number of Channel and Frequency Selectivity on Speech Understanding in Noise Preliminary Results in Simulation with Normal-Hearing Subjects

2020 ◽  
Vol 81 (1-4) ◽  
pp. 17-23
Author(s):  
P.A. Cucis ◽  
C. Berger-Vachon ◽  
R. Hermann ◽  
H. Thaï-Van ◽  
S. Gallego ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Signal To Noise Ratio ◽  
Normal Hearing ◽  
Measuring Channel ◽  
Frequency Selectivity ◽  
Speech Understanding ◽  
Preliminary Results ◽  
Channel Interaction ◽  
Speech Understanding In Noise ◽  
The Impact

The cochlear implant is the most successful implantable device for the rehabilitation of profound deafness. However, in some cases, the electrical stimulation delivered by the electrode can spread inside the cochlea creating overlap and interaction between frequency channels. By using channel-selection algorithms like the “nofm” coding-strategy, channel interaction can be reduced. This paper describes the preliminary results of experiments conducted with normal hearing subjects (n = 9). Using a vocoder, the present study simulated the hearing through a cochlear implant. Speech understanding in noise was measured by varying the number of selected channels (“nofm”: 4, 8, 12 and 16of20) and the degree of simulated channel interaction (“Low”, “Medium”, “High”). Also, with the vocoder, we evaluated the impact of simulated channel interaction on frequency selectivity by measuring psychoacoustic tuning curves. The results showed a significant average effect of the signal-to-noise ratio (p < 0.0001), the degree of channel interaction (p < 0.0001) and the number of selected channels, (p = 0.029). The highest degree of channel interaction significantly decreases intelligibility as well as frequency selectivity. These results underline the importance of measuring channel interaction for cochlear implanted patients to have a prognostic test and to adjust fitting methods in consequence. The next step of this project will be to transpose these experiments to implant users, to support our results.

scholarly journals A Music-Related Quality of Life Measure to Guide Music Rehabilitation for Adult Cochlear Implant Users

2017 ◽  
Vol 26 (3) ◽  
pp. 268-282 ◽  
Author(s):  
Giorgos Dritsakis ◽  
Rachel M. van Besouw ◽  
Pádraig Kitterick ◽  
Carl A. Verschuur
Keyword(s):  
Quality Of Life ◽  
Cochlear Implant ◽  
Music Perception ◽  
Life Support ◽  
Short Form ◽  
Normal Hearing ◽  
Face Validity ◽  
Related Quality ◽  
The Impact

Purpose A music-related quality of life (MuRQoL) questionnaire was developed for the evaluation of music rehabilitation for adult cochlear implant (CI) users. The present studies were aimed at refinement and validation. Method Twenty-four experts reviewed the MuRQoL items for face validity. A refined version was completed by 147 adult CI users, and psychometric techniques were used for item selection, assessment of reliability, and definition of the factor structure. The same participants completed the Short Form Health Survey for construct validation. MuRQoL responses from 68 CI users were compared with those of a matched group of adults with normal hearing. Results Eighteen items measuring music perception and engagement and 18 items measuring their importance were selected; they grouped together into 2 domains. The final questionnaire has high internal consistency and repeatability. Significant differences between CI users and adults with normal hearing and a correlation between music engagement and quality of life support construct validity. Scores of music perception and engagement and importance for the 18 items can be combined to assess the impact of music on the quality of life. Conclusion The MuRQoL questionnaire is a reliable and valid measure of self-reported music perception, engagement, and their importance for adult CI users with potential to guide music aural rehabilitation.

Effect of Synchronized Linked Band Selection on Speech Intelligibility of Bilateral Cochlear Implant Users

2020 ◽  
Author(s):  
Tom Gajęcki ◽  
Waldo Nogueira
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implant ◽  
Background Noise ◽  
Speech Intelligibility ◽  
Signal To Noise Ratio ◽  
Normal Hearing ◽  
Band Selection ◽  
Signal To Noise ◽  
Intelligibility Test ◽  
Bilateral Cochlear Implant

Normal hearing listeners have the ability to exploit the audio input perceived by each ear to extract target information in challenging listening scenarios. Bilateral cochlear implant (BiCI) users, however, do not benefit as much as normal hearing listeners do from a bilateral input. In this study, we investigate the effect that bilaterally linked band selection, bilaterally synchronized electrical stimulation and ideal binary masks (IdBMs) have on the ability of 10 BiCIs to understand speech in background noise. The performance was assessed through a sentence-based speech intelligibility test, in a scenario where the speech signal was presented from the front and the interfering noise from one side. The linked band selection relies on the most favorable signal-to-noise-ratio (SNR) ear, which will select the bands to be stimulated for both CIs. Results show that no benefit from adding a second CI to the most favorable SNR side was achieved for any of the tested bilateral conditions. However, when using both devices, speech perception results show that performing linked band selection, besides delivering bilaterally synchronized electrical stimulation, leads to an improvement compared to standard clinical setups. Moreover, the outcomes of this work show that by applying IdBMs, subjects achieve speech intelligibility scores similar to the ones without background noise.

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