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Table 1 Recommended noise exposure thresholds

From: Noise exposure while commuting in Toronto - a study of personal and public transportation in Toronto

Duration

WHO /EPA (dB)

OSHA (dB)

NIOSH 1997 (dB)

8 h

75

90

85

4 h

78

95

88

2 h

81

100

91

1 h

84

105

94

30 min

87

110

97

15 min

90

115

100

7 min 30 s

93

 

103

3 min 45 s

96

 

106

1 min 53 s

99

 

109

56 s

102

 

112

28 s

105

 

115

14 s

108

 

118

7 s

111

 

121

4 s

114

 

124