To measure the noise level during the period 8-hour performance of employees in a factory from 9.00-17.00 pm.
.To keep the sample in the study was used to select the sample does not use probability (sampling Non-probability) type specific examples (Purposive sampling)
.Continue to collect samples of sounds by using a sound level meter (Sound level meter) 1.5 m away from the source of sound reflection set altitude 1.2 meters from the entire sample collection points, 15 points is the Department checks (1 point A, 2B) the Department made a spiral (point 3C and 4D) Department, QC (5 points)-shooting Dept. Sai (6 points) imply grinding Department (7E and 8 F). Construction Department (9 points) (10 points), the oven Department Department of electric furnace (11 points). (12 points). Sand blasted Department (13 points) the Department tap Select (14 points), maintenance (15 points), which is shown in Figure 1, taken in comparison
.The Ministry's industrial safety protection measures in factory operations on the environment, in the operation of the Ministry of Industry (Notification, 2003) and then measure the volume across audio line. 10 minutes per point by hitting the grid in phase 2 × 2 meters to create a vertical map line sounds within the industrial production of
steel joints.
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