Clinical Research Directory

Fatigue and Hearing Performance of Healthy Volunteers Acutely Exposed to Occupational Noise ( FATIGAUDIT)

Occupational noise exposure is regulated by law, and protective measures are applied if the noise level exceeds 90 dB(A). The inferior exposure levels can cause an auditory fatigue which is defined as temporary and reversible hearing loss. Its mechanisms, however, remain largely underexplored with recent animal data suggesting that the long-term exposure (over several weeks) to noise above 85 dB Sound Pressure Level (SPL) may provoke a permanent damage to hearing. Furthermore, there is also a lack of research on cognitive and attentional repercussions of this phenomenon. Yet, this information could be important to prevent work-related errors and accidents. Lastly, although silent breaks (noise-free resting periods) throughout a day of work are preconized to limit the noise exposure, their effect on auditory fatigue has never been demonstrated. Being a part of a larger project involving fundamental researchers (animal experimentation) and occupational health specialists (investigations at the workplace), this study aims: * to evaluate how auditory fatigue caused by acute noise exposure in doses tolerated by law impacts auditory and cognitive performances in humans * to determine the effect of silent breaks proposed by occupational legislation on cognitive functioning * to issue new recommendations for the protection of workers exposed to noise