Browsing by Author "Tripathy, D.P."

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    Assessment of noise induced hearing loss (NIHL) of mine workers in a bauxite mine using fuzzy logic
    (2015) Tripathy, D.P.; Rao, D.S.
    Noise induced hearing loss is a noticeable problem in mining industry and is mainly caused due to constant exposure to noise. Frequent exposures to loud machinery, over a prolonged period of time, present severe risks to human hearing. In surveys conducted by the DGMS/investigators, it was found that noise levels in majority of the mining operations were higher than the recommended limit of 85 dB (A). In this paper, an attempt has been made to conduct audiometry survey of 200 mine workers of a major bauxite mine of Odisha, India. Data of miners exposed to noise (? 85 dB A) were included and tested for noise-induced hearing loss (NIHL) by using Digital Audiometer. Audiometry results showed that 2.3% miners were affected by NIHL in the age group of 38 to 55 years. Further a GUI model was developed to predict NIHL by using noise level, frequency and exposure to noise. GUI model showed that the high level of exposure to noise is directly proportional to percentage of NIHL. � 2015 by ASME.
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    Assessment of noise induced hearing loss (NIHL) of mine workers in a bauxite mine using fuzzy logic
    (The Institute of Noise Control Engineering of the USA, Inc., 2015) Tripathy, D.P.; Rao, D.S.
    Noise induced hearing loss is a noticeable problem in mining industry and is mainly caused due to constant exposure to noise. Frequent exposures to loud machinery, over a prolonged period of time, present severe risks to human hearing. In surveys conducted by the DGMS/investigators, it was found that noise levels in majority of the mining operations were higher than the recommended limit of 85 dB (A). In this paper, an attempt has been made to conduct audiometry survey of 200 mine workers of a major bauxite mine of Odisha, India. Data of miners exposed to noise (≥ 85 dB A) were included and tested for noise-induced hearing loss (NIHL) by using Digital Audiometer. Audiometry results showed that 2.3% miners were affected by NIHL in the age group of 38 to 55 years. Further a GUI model was developed to predict NIHL by using noise level, frequency and exposure to noise. GUI model showed that the high level of exposure to noise is directly proportional to percentage of NIHL. © 2015 by ASME.
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    Noise measurement in a mechanized opencast bauxite mine: A case study
    (Multi-Science Publishing Co. Ltd claims@sagepub.com, 2015) Tripathy, D.P.; Rao, D.S.
    Occupational noise is one of the most common pollutants in the mining sector. Prolonged exposure of miners to high levels of noise can cause noise induced hearing loss besides several non-auditory health effects. As these effects have a significant impact on people's health, it is essential to assess the noise exposure and to adopt ameliorative solutions. This work has been carried out to study the noise levels of different machines in a highly mechanized opencast bauxite mine of Odisha, India. A number of measurements have been carried out using an Extech 1/3 Octave band analyser and sound level meter to collect data where the miners are exposed to different tasks during the occupational process. Noise measurements were carried out at work places of 10 different machinery sources in the bauxite mine. The average noise levels generated from the different machines were compared with permissible exposure levels of workers as per OSHA guidelines. Further contour mapping was plotted to show the noise levels at each work place.