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Table 2 Distribution of measured noise exposure in the farm machinery factory workers over the four year study observation period

From: Hearing effects from intermittent and continuous noise exposure in a study of Korean factory workers and firefighters

  2006 2007 2008 2009
Number of samples 31 31 32 28
Mean dBA (SD) 82.48 (5.13) 82.44 (6.68) 82.46 (6.56) 82.41 (6.85)
Median dBA 82.7 83.2 83 82.3
Range dBA 70-96 66.8-92.6 66.8-97.3 71.6-98
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