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KMID : 0353019680050010009
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Korean Journal of Public Health
1968 Volume.5 No. 1 p.9 ~ p.16
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A Study on Noise Levels in Various Industries in Korea
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Paik Nam-Won
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Abstract
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Increasing mechanization and speeding up of industrial processes are often accompanied by increased noise.
A study was carried out to find out noise levels in various plants in Korea from May I to September 30, 1967 and the results were as follows:
1) Shipbuilding plants produced the highest noise levels ranging from 92 to 126 phon and printing plants had the lowest noise levels of 57 to 94 phon.
The levels at automobile industries were in the range of 81 to 117 phon, those at coal mines, 97 to 115 phon, at steel industries, 86 to 113 phon, at refining industries 85 to 110phon. at paper mills, 82 to 99 phon and at china wares, 90 to 98 phon.
2) As for the noise levels produced by various types of machines, those of air hammers were the highest 117 phon and those of carving machines were the lowest with a range of 80 to 83 phon.
The levels of drilling machines ranged from 114 to 115 phon, those of air grinders, 112 to 113 phon, of rolling mills, 103 to 110 phon, of circular saws, 104 to 105 phon, of blast furnaces, 102 to 110 phon and those of cutting machines, 103 to 105 phon.
3) According to the octave band analyses, the noises of air harmers, drilling machines, cutting machines, air grinders and circular saws showed the high frequencies, those generated by rolling mills, shapers, sewing machines, dryers and spinning frames had the middle frequencies, and those by blast furnaces, heating furnaces and electric machines were in the low frequency category.
4) According to calculation based on the noise rating system proposed by the International Organization for Standardization (ISO), the allowable exposure times were less than 10 minutes in the cocking processes of shipbuilding plants and no hazadous noises were found throughout the printing plants.
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