A new Neuro-Immersion system based on virtual reality and 3D motion tracking has been developed recently, allowing to evaluate and record the spatial localization performance of cochlear implant (CI) users. This system allows to highlight localization deficits in three-dimensional space for all CI patients. Unfortunately, there is currently no suitable postoperative management for these localization problems. However, the discomfort felt by patients is clearly verbalized. Thanks to the new virtual reality system, it is now possible to develop a rehabilitation protocol adapted to each patient. This project will focus on the evaluation of a spatial auditory rehabilitation, based on unisensory (visual) or multisensory (auditory and visual) feedback, for bilateral CI adults.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
12
The rehabilitation protocol with visual-auditory feedback is based on 8 sessions, over a period of 1 month, with 2 sessions per week. Each session lasts 45 minutes. During a session, the participant has to localize a sound around him, at hand. For this, he has to direct his head (which acts as a pointer) to the place where he seems to get the sound. Then, he validates his answer using the joystick placed in his hand. Regardless of the answer given (exact or incorrect), the subject will always have a visual-auditory feedback
The rehabilitation protocol with visual feedback is based on 8 sessions, over a period of 1 month, with 2 sessions per week. Each session lasts 45 minutes. During a session, the participant has to localize a sound around him, at hand. For this, he has to direct his head (which acts as a pointer) to the place where he seems to get the sound. Then, he validates his answer using the joystick placed in his hand. Regardless of the answer given (exact or incorrect), the subject will only have a visual feedback.
Data from spatial sound perception will be recorded in three dimensional space (azimuth, elevation, and depth). First, the pointing error will be computed separately for azimuth, elevation, and depth, in terms of constant error (absolute and signed) and variable error. Then, these separate errors will be combined into a cumulative error "3d-D", hence summarizing all three space dimensions, and taking into account absolute and variable error in one measure. This lasts 10 minutes and the result is expressed by the 3d-D value
This test assesses the intelligibility threshold defined as the noise level (in decibels) for which the subject can repeat 50% of the words heard (in dichotic listening), resulting in an Speech Recognition Threshold (SRT) value. This test lasts 10 minutes.
15 items questionnaire (each answer to questions is quoted between 0 and 10) resulting in a global SSQ 15 score. It takes 10 minutes to fill the questionnaire.
Hôpital Edouard Herriot
Lyon, France
Short term rehabilitation effect on the spatial auditory performance - 4 sessions
This effect will be defined as any change in auditory performance scores (3d-D value OR SRT value or SSQ15 questionnaire score) between baseline (before rehabilitation starts) and short term rehabilitation (4 rehabilitation sessions)
Time frame: 4 weeks after inclusion
Short term rehabilitation effect on the spatial auditory performance - 8 sessions
This effect will be defined as any change in auditory performance scores (3d-D value OR SRT value or SSQ15 questionnaire score) between baseline (before rehabilitation starts) and short term rehabilitation (8 rehabilitation sessions)
Time frame: 6 weeks after inclusion
Percentage of sessions performed on all the rehabilitation sessions during the protocol
compliance of participant to attend the rehabilitation sessions will be measured by calculating the percentage of sessions performed on all the rehabilitation sessions during the protocol
Time frame: 6 weeks after inclusion
Middle term rehabilitation effect on the spatial auditory performance
This effect will be defined as any change in auditory performance scores (3d-D value or SRT value or SSQ15 questionnaire score) between baseline (before rehabilitation starts) and 8 to 10 weeks after the first rehabilitation session
Time frame: 10 to 12 weeks after inclusion
Measure of auditory performance tests own effect
This effect corresponds to the difference between auditory performance scores (3d-D value, SRT value and SSQ15 questionnaire score) at inclusion and 2 weeks after inclusion, before rehabilitation starts.
Time frame: 2 weeks after inclusion
Short term feedback effect on spatial auditory performance
The short term feedback effect on spatial auditory performance will be assessed by comparing the auditory performance scores (3d-D value, SRT value and SSQ15 questionnaire score) of the two groups after 4 rehabilitation sessions
Time frame: 4 weeks after inclusion
Short term feedback effect on spatial auditory performance
The short term feedback effect on spatial auditory performance will be assessed by comparing the auditory performance scores (3d-D value, SRT value and SSQ15 questionnaire score) of the two groups after 8 rehabilitation sessions
Time frame: 6 weeks after inclusion
Middle term feedback effect on spatial auditory performance
The middle term feedback effect on spatial auditory performance will be assessed by comparing the auditory performance scores (3d-D value, SRT value and SSQ15 questionnaire score) of the two groups 8 to 10 weeks after the first rehabilitation session
Time frame: 10 to 12 weeks after inclusion
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