Average Noise Levels in Various Metropolitan Cities
(Decibels/Annum)
Metropolitan Cities
Day/Night
Industrial Area
Commercial Area
Residential Area
Silence Area
Calcutta
Day
78
82
79
79
Night
67
75
65
65
Mumbai
Day
76
75
70
66
Night
65
66
62
52
Chennai
Day
71
78
66
63
Night
66
71
48
49
Bangalore
Day
78
76
67
67
Night
53
57
50
NA
Source: Ministry of Environment & Forests
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