Spatial Hearing Perception in Bilateral Cochlear Implant Children

Not Applicable

Completed

• Conditions: Cochlear Impant Children
• Interventions: Other: behavioral exploration of spatial hearing performances; Other: The Speech, Spatial and Qualities of Hearing Scale (SSQ) questionnaire (for cochlear implant children and their parents); Other: The Speech, Spatial and Qualities of Hearing Scale (SSQ) questionnaire (for parents of CI children)

• Registration Number: NCT03738592
• Lead Sponsor: Hospices Civils de Lyon

Brief Summary

Spatial hearing in cochlear implant (CI) users is a challenging investigation field since no studies have explored yet spatial auditory perception in three-dimensional space (3D). Moreover auditory rehabilitation after cochlear implantation is totally devoted to speech rehabilitation to date.

A novel methodology based on virtual reality and 3D motion capture protocol in an immersive reality system has recently been developed to evaluate and record spatial hearing abilities of norm-hearing (NH) listeners and CI adults in 3D. The results revealed worse sound localization in 3D for CI users compared to NH participants, and interestingly noted that head movements could improve sound localization performances, leading to a possible track for auditory rehabilitation.

The aim of this study is to explore spatial hearing in CI children with the protocol already tested in CI adults. This protocol will be adapted to children over eight years old. Children will have to perform a sound localization task in 3D without any feedback of performances. The knowledge improvement in pediatric sound localization will lead to develop a specific spatial rehabilitation in cochlear implant children.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2018-10-08
• Study First Submitted QC: 2018-11-08
• Study First Posted: 2018-11-13
• Study Start: 2019-01-24
• Status Verified: 2019-11
• Primary Completion: 2019-11-18
• Study Completion: 2019-11-18
• Last Update Submitted: 2019-11-21
• Last Update Posted: 2019-11-22

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 36

Inclusion Criteria

Not provided

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
normal hearing children	behavioral exploration of spatial hearing performances	18 normal hearing children wil include in this study
cochlear implant children	behavioral exploration of spatial hearing performances	18 cochlear implant children wil include in this study
cochlear implant children	The Speech, Spatial and Qualities of Hearing Scale (SSQ) questionnaire (for cochlear implant children and their parents)	18 cochlear implant children wil include in this study
cochlear implant children	The Speech, Spatial and Qualities of Hearing Scale (SSQ) questionnaire (for parents of CI children)	18 cochlear implant children wil include in this study

Primary Outcome Measures

Name	Time	Method
measure of the spatial hearing deficit matching the distance between the hand pointing error and the sound source position in space	thirty minutes	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 "D", hence summarizing all three dimensions of space, and taking into account absolute and variable error in one measure.

Secondary Outcome Measures

Name	Time	Method
change of the pupil diameter during a sound localization task	thirty minutes	Pupil diameter will be recorded with an eye tracking system during all experiment
impact of age at cochlear implantation on spatial hearing deficit	thirty minutes	spatial hearing deficit will be correlated to the age at cochlear implantation
correlation between a clinical score (SSQ) and sound localization performances	28 days	The SSQ questionnaire is a clinical subjective scale adapted to parents and cochlear implant children. It allows evaluating hearing performances in daily life. The questionnaire is divided into 3 main items (A: speech; B: spatial hearing; C: other qualities of hearing) comprising questions with rating scores out of ten. For example, a zero score corresponds to bad hearing abilities. We will therefore correlate the mean score of all questions out of ten to the cumulative error "D".
measure of head and eye movements in three dimensional space with a motion tracking system (virtual reality system including a Head-Mounted display) to evaluate their roles in spatial hearing performances.	thirty minutes	Head and eye movements will be recorded in three dimensional space with a motion tracking system (virtual reality system including a Head-Mounted display). The cumulative error "D" will be calculated in two different conditions: first, participant's head will be fixed during sound emission and then, head and eyes will be free to move. If the cumulative error "D" significantly decreases when head movements are free, we could say that head movements allow/help improving spatial hearing performances.

Trial Locations

Locations (2)

Centre de Recherche en Neuroscience de Lyon (CRNL); 🇫🇷 Bron, France

Hôpital Edouard Herriot; 🇫🇷 Lyon, France