Occupational noise exposure and hearing loss among pulse processing workers |
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Authors: | V S Patel S T Ingle |
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Institution: | (1) School of Environmental Sciences, North Maharashtra University, Jalgaon, 425 001, Maharashtra, India |
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Abstract: | Occupational noise exposure and noise-induced hearing loss (NIHL) has been recognised as a problem among workers in Indian
industries. The major industries in India are based on the processing of agricultural products. There are appreciable numbers
of pulse processing units spread throughout the country. The purpose of this study was to determine the prevalence of hearing
loss among pulse processing workers. As a part of hearing protection intervention, audiometric tests were conducted at the
binaural low (250–1,500 Hz), the binaural mid (1,500–4,000 Hz) and the binaural high (3,000–8,000 Hz) frequency averages.
The prevalence of hearing loss was determined based on hearing threshold levels (HTLs) with a low fence of 25 dB. Over 50%
of pulse processing workers (dana bazaar and dal mill) showed hearing loss in the noise-sensitive higher (binaural mid and
high) frequencies. The rate of hearing loss was particularly high among workers in the dal mill. The analyses show a higher
risk of prevalence of hearing loss among the dal mill workers compared to the workers associated with the grain preprocessing
activities. The study shows alarming signals of NIHL, especially in the dal mill workers. The occupational exposure to noise
could be minimised by efficient control measures through engineering controls, administrative controls and the use of personal
protective devices. Applications of engineering and/or administrative controls are frequently not feasible in developing countries
for technical and financial reasons. A complete hearing conservation programme, including training, audiometry and the use
of hearing protection devices, is the most feasible method for the protection of industrial workers from prevailing noise
in workplace environments in the developing countries. |
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Keywords: | Hearing loss Prevalence Audiometer Noise frequency Pulse processing |
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