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Year : 2012  |  Volume : 14  |  Issue : 56  |  Page : 28--31

Amplitude changes in otoacoustic emissions after exposure to industrial noise

1 Department of Otolaryngology, Head and Neck Surgery, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
2 Industrial Medicine Department, Iran Petroleum Industry Health Organization, Tehran, Iran
3 Department of Occupational Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
4 Department of Otolaryngology, Tehran University of Medical Sciences, Tehran, Iran

Correspondence Address:
Amir Houshang Mehrparvar
Department of Occupational Medicine Clinic, Shahid Rahnamoun Hospital, Farrokhi Ave, Yazd
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1463-1741.93329

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Noise-induced hearing loss (NIHL) is a frequent problem in industrial settings, especially where a high noise level is present. It is permanent, and irreversible, but preventable. Routine audiometry (an objective and time consuming) test is used for NIHL screening. Otoacoustic emissions (OAEs) are recently proposed as a more sensitive test for early diagnosis of NIHL. In this study, we aimed to compare the results of pure tone audiometry (PTA) with OAE in the diagnosis of NIHL. In a cross-sectional study on 120 workers (in three groups: Not exposed to noise, exposed to noise without NIHL and exposed to noise with NIHL), we compared the results of PTA and OAE. OAE can detect some changes in the function of hearing system in subjects exposed to noise, and these changes are apparently prior to hearing loss, which is diagnosed by PTA. OAE is a more sensitive method for the early diagnosis of cochlear damage than PTA, and can be performed in industrial settings for NIHL screening.


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