Assessment of Work Zone Noise Levels at a Cement Factory in Tanga, Tanzania

Mndeme, FG; Mkoma, SL

doi:10.4314/ejesm.v5i3.2

Cited by 13 publications

(12 citation statements)

References 4 publications

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“…The results from the present study at the wheat processing factory on noise levels and workers response to impacts of noise in the workplace are comparable to those reported in other studies (Boateng and Amedofu [10], Prasanna Kumar et al [11], Mohammadi et al [12], Mndeme and Mkoma [13], Mijinyawan et al [14]). Previous studies carried out by researchers in other factories confirmed that there is an increase in noise levels in the workplaces of various factories.…”

Section: Comparison With Other Studiessupporting

confidence: 90%

“…Another study by Mohammadi et al [12] was conducted in a textile factory in Iran to determine the risk assessment of workers exposed to noise pollution and reported that hearing loss is not the only problem caused by occupational noise besides that other physiological and even psychological effects of noise must be considered which can affect workers performance. Tanga, Tanzania, Mndeme and Mkoma [13] assessed the work zone noise level at a cement factory. It was showed that the measured noise levels were found to be higher than WHO acceptable limit in some production sections.…”

Section: Comparison With Other Studiesmentioning

confidence: 99%

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Industrial noise level study in a wheat processing factory in ilorin, nigeria

Ibrahim¹,

Ajao²,

Aremu³

2016

International Journal of Applied Mechanics and Engineering

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An industrial process such as wheat processing generates significant noise which can cause adverse effects on workers and the general public. This study assessed the noise level at a wheat processing mill in Ilorin, Nigeria. A portable digital sound level meter HD600 manufactured by Extech Inc., USA was used to determine the noise level around various machines, sections and offices in the factory at pre-determined distances. Subjective assessment was also mode using a World Health Organization (WHO) standard questionnaire to obtain information regarding noise ratings, effect of noise on personnel and noise preventive measures. The result of the study shows that the highest noise of 99.4 dBA was recorded at a pressure blower when compared to other machines. WHO Class-4 hearing protector is recommended for workers on the shop floor and room acoustics should be upgraded to absorb some sounds transmitted to offices.

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Section: Comparison With Other Studiessupporting

confidence: 90%

Section: Comparison With Other Studiesmentioning

confidence: 99%

Industrial noise level study in a wheat processing factory in ilorin, nigeria

Ibrahim¹,

Ajao²,

Aremu³

2016

International Journal of Applied Mechanics and Engineering

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“…As can be seen in previous published works [10] [16], this unit is one of the top ranked noise pollution sources. So regardless to the type of stone in different factories, this unit naturally is a main source of noise.…”

Section: Measurements For Exposure Purposementioning

confidence: 62%

Acoustic Analysis of Machineries in the Cement Industry

Noorpoor

Orkomi²

2014

OJSST

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A study has been conducted at the Tehran cement factory to recognize and analyze the major noise emission source machineries. Cement industry has many process units. Basically all of these units or stages can be considered as a source of noise. Since noise pollution is defined based on its offensive hearing effects, the importance of the noise sources depends directly on the number of workers in the unit. In this survey, first, the mean A-weighted sound pressure level and number of the workers in each unit have been measured and the obtained data were analyzed in Microsoft Excel. The noisiest units have been recognized and some applicable suggestions offered to reduce the sound exposure level. Afterwards, based on the mentioned ISO, some experiments have been done to calculate the A-weighted acoustic power level of the crusher which emitted the highest level of noise. By calculating the sound power levels and considering the affecting design parameters on the sound power generated by the crusher, an empirical equation has been presented to calculate the acoustic power level as a function of physical parameters horsepower, number of hammers and the weight of each hammer.

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“…Noise levels in a cement industry were higher than WHO acceptable limit. Hearing loss eventually developed to noise level above 85 dB(A) which workers were aware of (Mndeme and Mkoma, 2012). Flour mill workers were not aware of noise-induced hearing loss; however, they had reported the hearing problem.…”

Section: Number Of Flour Millsmentioning

confidence: 99%

Flour Mill Workers Occupational Noise Exposure in Chandrapur City, Central India

Nimgade¹,

Kamble²

2018

Int. J. Environ.

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Assessment of occupational noise exposure of flour mill workers in Chandrapur city of central India was carried out during November 2015-January 2016. Total 62 flour mills were selected for this study comprising one, two and three grinding machines operating in the shop floor. The sound level meter was used to measure sound level at 50 cm and 3 meters from grinding machines at receiver’s position during operation. Noise monitoring was also recorded when one, two and three machines were operating individually and simultaneously. The results showed that noise levels when one grinding machine in operation in close proximity (50 cm) was in the range of 80-97 dB(A). Comparison of these observations with that of 3 meters distance; it was observed that noise levels got reduced and in the range of 70-77 dB(A). In the case of two machines in operation, it was in the range of 95-118 dB(A) at 50 cm distance and reduced to 75-95 dB(A) at 3 meters distance. This reduction in noise level was due to the propagation of noise in the ambient environment. Furthermore, daily noise exposure points, exposure points job per task and exposure points per hour were computed by using noise exposure calculator developed by Health and Safety Executive (HSE), United Kingdom. The computation from this calculator revealed that these attributes were directly depended upon noise levels in flour mills and duration of noise exposure. A positive linear Pearson’s correlation (p<0.01) was observed between noise level and exposure points per hour. Of the 65 flour mill workers surveyed, 70.76% reported a hearing problem, 23.07% headache at work and out of which 7.69% workers headache remains after completion of work also. Remedial measures to control noise exposure to flour mill workers such as ear plugs, ear muff, semi-insert are recommended.

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Assessment of Work Zone Noise Levels at a Cement Factory in Tanga, Tanzania

Cited by 13 publications

References 4 publications

Industrial noise level study in a wheat processing factory in ilorin, nigeria

Industrial noise level study in a wheat processing factory in ilorin, nigeria

Acoustic Analysis of Machineries in the Cement Industry

Flour Mill Workers Occupational Noise Exposure in Chandrapur City, Central India

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