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: height 1.2 meters from the entire sample collection point 15 point is water check Department.
(2B and A 1 point)
Division made a spiral (point 3C and 4D)
.Departments q-z (5 points)
(6 points), the sand shot Department
words grinding Department (7E and 8 point F)
(9 points) and construction department
oven Department (10 points)
electric furnace Department (11 points)
cupola furnace Division (point 12)
sand blasted Department (13 points)
select (14 points) tap Department
maintenance (15 points)
.Which is shown in Figure 1, and then be compared with the industry Ministry's powerful measures to protect safety 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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