Evaluation of Auditory Fatigue in Medical Regulation Assistants

Study Overview
=================
Brief Summary
-----------------
Auditory monitoring of employees is currently based on pure-tone audiometry. However, this clinical examination does not prevent from deafness but established it a posteriori. From a preventive standpoint, it is important to detect hearing professional pain before the development of irreversible(s) clinical(s) symptom(s). The investigators' hypothesis is that auditory fatigue results from damages of primary and secondary central auditory pathways involving cognitive processes. The assessment of auditory fatigue includes the evaluation of speech intelligibility, short-term memory, working memory and perceived mental task load. The main objective of this study is to identify, among regulating medical assistants working with headset, a central auditory fatigue.

Official Title
-----------------
Effects of Auditory Fatigue in Medical Regulation Assistants Working With Headset: Objective Measures

Conditions
-----------------
Auditory Fatigue

Intervention / Treatment
-----------------
* Other: Exposure to auditory fatigue


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Participants without hearing loss and without ontological antecedents in the past 5 years Participants gave their written informed consent Participants are affiliated to the french social welfare Preliminary clinical examination Exclusion Criteria: Ontological antecedents in the past 5 years Pathology of the external or middle ear Abnormality in audiometric examination Participants already enrolled in an other research protocol Participants covered by articles L.1121-5 à L.1121-8 et L.1122-1-2 of the French Public Health Code

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Exposed<br>Medical regulation assistants working with headset | Other: Exposure to auditory fatigue<br>* 12-hour auditory exposure<br>|
| Non-Exposed<br>Participants working without headset | |

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in speech intelligibility |  | Before and after the 12-hour auditory exposure | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in perceived mental task load |  | During (after 2-hour auditory exposure) and after the 12-hour auditory exposure | 
| Change in short-term memory |  | Before and after the 12-hour auditory exposure | 
| Change in working memory |  | Before and after the 12-hour auditory exposure | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Speech intelligibility, Short-term memory, Perceived mental task load, Working memory