TY - JOUR AU - Nadon, Vincent AU - Bockstael, Annelies AU - Botteldooren, Dick AU - Voix, Jérémie PY - 2016/08/24 Y2 - 2024/03/19 TI - Pilot study on individual dose-response relationship evaluated through otoacoustic emission measurements in controlled noise exposure: influence of circadian rhythm JF - Canadian Acoustics JA - Canadian Acoustics VL - 44 IS - 3 SE - Proceedings of the Acoustics Week in Canada DO - UR - https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2929 SP - AB - <pre>Over 22 million of North American workers are exposed daily to noise doses that may induce hearing loss. Unfortunately, current practices to prevent occupational noise-induced hearing loss (<span>NIHL</span>) based on group average of exposure/damage relationships do not account for the <span>individual’s</span> susceptibility. Consequently, <span>NIHL</span> remains one of the biggest cause of invalidity and indemnity in North America.</pre> <pre><br /></pre> <pre>To improve hearing conservation in the workplace, a procedure to continuously measure hearing fatigue using <span>otoacoustic</span> emissions (<span>OAE</span>) has been developed using a portable and robust <span>OAE</span> system designed for noisy field use.</pre> <pre><br /></pre> <pre>A pilot study has been conducted on human subjects in laboratory, playing back <span>pre</span>-recorded noise samples at realistic levels while recording the accumulated individual noise dose. To monitor the temporary effects (response) on the <span>individuals’</span> inner-ear during the exposure, <span>OAEs</span> were measured periodically on subjects using either the designed <span>OAE</span> system or a reference <span>OAE</span> system. <span>Audiometric</span> thresholds, <span>stapedius</span> and medial <span>olivocochlear</span> reflex were also measured <span>pre</span> and post-exposure to monitor other potential effects on hearing. The potential effects of circadian rhythm on <span>pre</span> and post-exposure measurements are briefly studied here.</pre><p> </p> ER -