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Master Thesis

Utilité d’une audiométrie vocale dans le bruit pour l’évaluation des capacités auditives du militaire exposé au bruit

Abstract : Pure tone audiometry is the main method used to monitor the hearing of French military personnel. However, the link between hearing ability in a real environment and pure tone audiometry has been questioned. Previous studies have reported significant variability in speech understanding in noise among young normal-hearing individuals. This inter-individual variability could be explained by the fact that high noise levels exposure would lead to the development of cochlear synaptopathies without causing a permanent rise in audiometric thresholds. Therefore, pure tone audiometry conducted at the periodic medical check-up could be doubly limited: on the one hand as a secondary prevention measure and on the other hand as a measure of hearing ability. To assess whether pure tone audiometry is sufficient to predict speech understanding in noise in military personnel regularly exposed to noise, and to provide evidence for the existence of cochlear synaptopathies in humans, we performed pure tone audiometry and speech audiometry in noise, in 65 soldiers. They all had an occupational noise exposure, and their risk of cochlear synaptopathy was estimated according to their level of noise exposure and their age. Our results show a lack of correlation between the thresholds measured in pure tone audiometry and the score in speech audiometry in noise. Furthermore, the results of speech audiometry in noise do not deteriorate more rapidly with age in the most noise-exposed population, possibly because of different individual susceptibility. Longitudinal studies considering the many confounding factors, including individual susceptibility, will be needed to demonstrate cochlear synaptopathy in the military population. Our results suggest that periodic voice audiometry in noise could improve the monitoring of hearing in military personnel.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-03468716
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Submitted on : Tuesday, December 7, 2021 - 11:59:06 AM
Last modification on : Friday, December 17, 2021 - 3:47:06 AM

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  • HAL Id : dumas-03468716, version 1

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Noé Vertongen. Utilité d’une audiométrie vocale dans le bruit pour l’évaluation des capacités auditives du militaire exposé au bruit. Médecine humaine et pathologie. 2021. ⟨dumas-03468716⟩

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