Assessment of noise level of a medium scale thermal power plant

Kisku, Ganesh Chandra; Sk, Bhargava

doi:10.4103/0019-5278.29575

Cited by 21 publications

(13 citation statements)

References 3 publications

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“…The revision of occupational Indian noise standard is recommended at par with International/European standards. [14] An exposure to high intensity noise of 88-107 dB(A) six to eight hrs/day for long duration (10-15 years) brings about biochemical changes which make him prone to cardiovascular pathology. [15] Temporary threshold shift (TTS) recovery time is dependent on the magnitude of the initial hearing loss.…”

Section: Heat Stress and Human Performancementioning

confidence: 99%

Occupational exposure in small and medium scale industry with specific reference to heat and noise

2010

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This study was undertaken to assess heat and noise exposure and occupational safety practices in small and medium scale casting and forging units (SMEs) of Northern India. We conducted personal interviews of 350 male workers of these units through a comprehensive questionnaire and collected information on heat and noise exposure, use of protective equipment, sweat loss and water intake, working hour. The ambient wet bulb globe temperature (WBGT index) was measured using quest temp 34/36o area heat stress monitor. A-weighted Leq ambient noise was measured using a quest sound level meter "ANSI SI. 43-1997 (R 2002) type-1 model SOUNDPRO SE/DL". We also incorporated OSHA norms for hearing conservation which include - an exchange rate of 5dB(A), criterion level at 90dB(A), criterion time of eight hours, threshold level is equal to 80dB(A), upper limit is equal to 140dB(A) and with F/S response rate. Results of the study revealed that occupational heat exposure in melting, casting, forging and punching sections is high compared to ACGIH/NIOSH norms. Ambience noise in various sections like casting / molding, drop forging, cutting presses, punching, grinding and barreling process was found to be more than 90dB(A). About 95% of the workers suffered speech interference where as high noise annoyance was reported by only 20%. Overall, 68% workers were not using any personal protective equipment (PPE). The study concluded that the proportion of SME workers exposed to high level heat stress and noise (60 - 72 hrs/week) is high. The workers engaged in forging and grinding sections are more prone to noise induced hearing loss (NIHL) at higher frequencies as compared to workers of other sections. It is recommended that there is a strong need to implement the standard of working hours as well as heat stress and noise control measures.

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Section: Heat Stress and Human Performancementioning

confidence: 99%

Occupational exposure in small and medium scale industry with specific reference to heat and noise

2010

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“…A number of studies have been carried out in last few decades to evaluate the occupational environment in processing and manufacturing industries and mining industries and oil and gas industries [4][5][6][7][8][9][10] and the results show that high percentage of industrial workers were exposed to more than 85 dB(A) noise levels. In spite of these studies, high noise levels have been traditionally taken for granted in industries in developing countries especially Nigeria.…”

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confidence: 99%

An Overview of Industrial Employees' Exposure to Noise in Sundry Processing and Manufacturing Industries in Ilorin Metropolis, Nigeria

Olayinka

Abdullahi

2009

INDUSTRIAL HEALTH

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“…A number of studies have been carried out in the last few decades to evaluate the occupational environment in processing and manufacturing industries, mining industries, and oil and gas industries (Deborah et al 2005;Kock et al 2004;Raman 2006;Boateng and Amedofu 2004;Ydego 1991;Kisku and Bhargara 2006;Georgiescu 2000;Avwiri and Nte 2003), and the results show that a high percentage of industrial workers were exposed to more than 85 dB(A) noise levels. In spite of these studies, high noise levels have been traditionally taken for granted in industries in developing countries, especially Nigeria.…”

Section: Introductionmentioning

confidence: 97%

“…The results of the investigation indicate gross occupational exposure to noise in these industries where more than 30% of the workers are exposed to noise levels exceeding 90 dB(A). Kisku and Bhargara (2006) Only a few studies have been carried out in assessment of industrial noise exposure in Ilorin metropolis. In 1985, Saadu (1988 assessed the occupational environment of newspaper printing press, steel rolling mill, soft-drink bottling, match making, mattress making, and beer brewing and bottling industries in Ilorin metropolis.…”

Section: Introductionmentioning

confidence: 99%

Assessment of noise level in sundry processing and manufacturing industries in Ilorin metropolis, Nigeria

Oyedepo

Saadu

2009

Environ Monit Assess

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In this work, noise level in five selected processing and manufacturing industries in Ilorin are evaluated and compared. Emphasis is given to noise emitted by individual industrial machinery from the selected industries. Event L(Aeq) and L(N) cycles were studied to identify the noisy machines and to generate baseline data. Findings show that hammer mill machine from mineral-bearing rock-crushing mills produced the highest average noise [98.4 dB(A)], an electric generator 1 [95.6 dB(A)] from the soft drink bottling industry, an electric generator [97.7 dB(A)] from the beer brewing and bottling industry, a vacuum pump [93.1 dB(A)] from the tobacco making industry, and an electric generator 2 [94.1 dB(A)] from the mattress-making industry. The highest and lowest average noise exposure levels are recorded in mineral-bearing rock-crushing mills [93.16 dB(A)] and the mattress making industry [84.69 dB(A)], respectively. The study shows that, at 95% confidence level, there is significant difference (P < 0.05) in noise levels in the industries surveyed. The percentages of machines that emit noise above Federal Environmental Protection Agency and Occupational Safety and Health Administration recommendations [90 dB(A)] are from the soft drink bottling industry (83.3%), the beer brewing and bottling industry (42.9%), the tobacco making industry (71.4%), the mattress making industry (11.1%), and minerals crushing mills (87.5%). In the past 20 years, the noise levels in the soft drink bottling industry were reduced by 0.58 dB(A), and those of the beer brewing and bottling industry were reduced by 9.66 dB(A). However, that of the mattress making industry increased by 2.69 dB(A). On average, the noise level in these industries has been reduced by 2.52 dB(A). The results of this study show that the noise control measures put in place have significant impacts on the noise exposure level in the industries surveyed.

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Assessment of noise level of a medium scale thermal power plant

Cited by 21 publications

References 3 publications

Occupational exposure in small and medium scale industry with specific reference to heat and noise

Occupational exposure in small and medium scale industry with specific reference to heat and noise

An Overview of Industrial Employees' Exposure to Noise in Sundry Processing and Manufacturing Industries in Ilorin Metropolis, Nigeria

Assessment of noise level in sundry processing and manufacturing industries in Ilorin metropolis, Nigeria

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