Maximum permitted duration of exposure to
A-weighted sound pressure level at the workplace

Level dBA

Maximum duration of exposure in hours per employee per 24 hours

83

20

84

16

85

13

86

10

87

8.0

88

6.4

89

5.0

90

4.0

91

3.2

92

2.5

93

2.0

94

1.6

95

1.3

96

1.0

97

0.80

98

0.64

99

0.50

100

0.40

101

0.32

More than 102

0.00