In the case of steel fence is installed. Which can reduce noise levels by up to 18 DB (a) in sensitive areas (which is 226-292 meters from the base area to the hole productions) Between 33.91-37.25 DB (a) and when combined with the current sound level sound level was found to be included in the construction execution phase at study affect the mood between 56.3 56.4-DB (a) sound level does not exceed that of standard values. Generally defined 70 dB (a) as announced by the national environment Board, vol. 15 (2540 (1997)) it defines the volume in General, and the level of noise that may occur on the affected sources will be sensitive to the value of 2.13-2.15 DB (a), as shown in.
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