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This is undertaken together with regular (annual) and standardised audiometry administered to all noise-exposed personnel, the results of which are monitored to identify any threshold shift to evaluate the effectiveness of the programme (NOHSC, 1991; Williams, 1993).
Although audiometry is helpful to determine the efficacy of conservation programmes, concern has been expressed about its sole use to identify hearing damage as inner ear injury may occur before a hearing loss is detectable (LePage & Murray, 1993; Williams, 2005a).
Thus OAE testing could be a useful tool in parallel to audiometry to identify individuals who are especially at risk of developing hearing loss (Zhang, Zhang, Zhu, Zheng & Deng, 2004).
5.3.4 Hearing tests (Otoscopy,Tympanometry and Audiometry)
Pure-tone audiometry was conducted in the quietest room that could be provided by the company (identified on day 1).
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