Three-dimensional Perception of Sounds in Military with Acoustic Trauma
SPHEAR
1 other identifier
observational
46
1 country
1
Brief Summary
Spatial hearing capacities of soldiers with acoustic trauma are evaluated in ENT consultations with routine tests (i.e. tonal audiometry, voice audiometry). While the results conclude that soldiers with acoustic trauma have sufficient abilities to carry out professional missions, soldiers report recurring complaints of sound localization (spatial hearing), i.e. difficulties in identifying the position of sound sources in their environment. However, there is currently no objective test to identify and objectify these complaints of spatial hearing. The investigators have developed a new approach (SPHERE) based on virtual reality and 3D motion tracking, allowing us to evaluate and record the spatial hearing performance of subject with hearing deficit. This system allowed us to highlight localization deficits in three-dimensional space. This project explores and quantifies the spatial hearing impairments of soldiers with acoustic trauma. The quantification of the spatial hearing capacities will allow to define a specific rehabilitation strategy of spatial hearing deficits.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for all trials
Started Mar 2023
Typical duration for all trials
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 1, 2022
CompletedFirst Posted
Study publicly available on registry
July 21, 2022
CompletedStudy Start
First participant enrolled
March 31, 2023
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 31, 2026
CompletedStudy Completion
Last participant's last visit for all outcomes
March 31, 2026
CompletedSeptember 25, 2024
September 1, 2024
3 years
July 1, 2022
September 23, 2024
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Cumulative error value "3d-D" measuring the spatial hearing performances
First, the pointing error will be computed for azimuth, elevation, and depth, in terms of constant error and variable error. Then, these separate dimension errors will be combined into a cumulative error "3d-D", taking into account absolute and variable error in one measure. 3d-D value corresponding to the spatial hearing deficit matching the distance between the 3D hand pointing position and the 3D sound source position. The 3dD performance of the Acoustic traumatised military group will be compared to that of the normal hearing group.
at Day 1 during the inclusion visit. The test last 30 minutes.
Secondary Outcomes (2)
Correlation between the score obtained in the SSQ and the 3dD auditory spatialization performance.
at Day 1 during the inclusion visit.
Correlation between the score obtained in the Framatrix and the 3dD auditory spatialization performance.
at Day 1 during the inclusion visit.
Study Arms (2)
Military person with acoustic trauma (experimental group)
Active or reserve military member, diagnosed with acoustic trauma for at least one month. Participants will be instructed to localize a sound emitted in their environment using a virtual reality setup.
Normal hearing volunteers (control group)
Person without known hearing loss.
Interventions
Participants will be instructed to localize a sound emitted in their environment using a virtual reality setup (SPHEAR protocol).
Intelligibility threshold is the signal-to-noise ratio (in decibels) for which the subject can repeat 50% of the words heard in a dichotic listening.
The SSQ questionnaire is a clinical subjective scale that allows evaluating of 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.
Eligibility Criteria
The Army Training Hospital of Lyon or within the medical branches of the Army Medical Centers are the structures where the soldiers will recruited. The Neurosciences research Center of Lyon or the ENT department of Edouard Herriot Hospital will recruit the normal hearing volunteers.
You may qualify if:
- acoustic traumatized military group :
- Age between 18 and 65 inclusive
- Active or reserve military personnel
- Diagnosis of noise trauma for at least one month
- Regularly followed up in the ENT department of the Desgenettes Army Training Hospital in Lyon or in the medical offices of the Army Medical Centers.
- Able to understand the experimental instructions
- Affiliated to a social security scheme
- Having been informed of the study and having given their agreement to participate normal hearing group :
- Age between 18 and 65 years inclusive
- Able to understand the experimental instructions
- Affiliated to a social security scheme
- Having been informed of the study and given their agreement to participate
You may not qualify if:
- Known current or past neurological or psychiatric disorder
- Oculomotor/visual disorder
- Bilateral vestibular areflexia
- Person under court protection, guardianship or curatorship
- Pregnant or breastfeeding woman
- Known hearing loss for normal hearing group
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Hopital Edouard Herriot
Lyon, 69003, France
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- CASE CONTROL
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 1, 2022
First Posted
July 21, 2022
Study Start
March 31, 2023
Primary Completion
March 31, 2026
Study Completion
March 31, 2026
Last Updated
September 25, 2024
Record last verified: 2024-09