Noise Exposure - NIOSH Permissible Levels and Duration

Calculate the maximum time of exposure to noise levels according to NIOSH standards. Exposure to noise should be controlled so that it is less than a maximum combination of exposure level and duration, using the formula: t = 480 / 2^((L - 85)/3)

Calculator

Inputs

Noise Exposure Level (dB(A)) (dB(A))

Results

Maximum Exposure Duration-- minutes

Noise Exposure Level (dBA)	Minutes	Seconds
80	25	24
81	20	10
82	16	0
83	12	42
84	10	5
85	8	0
86	6	21
87	5	2
88	4	0
89	3	10
90	2	31
91	2	0
92	1	35
93	1	16
94	1	0
95	0	47
96	0	37
97	0	30
98	0	23
99	0	18
100	0	15
101	0	11
102	0	9
103	0	7
104	0	5
105	0	4
106	0	3
107	0	2
108	0	2
109	0	1
110	0	1