Controlling Noise

If objectionable, excessive or unhealthy noise situations are identified in any environment, a course of action should be taken to eliminate or reduce the noise (through design changes or the use of sound-absorbing materials), or if that is not possible, to provide human protective equipment such as ear plugs, ear muffs, and specially designed helmets. Further, using Table 11.2 as a guide, potential exposure to excessive noise can be identified and avoided.

Table 11.2. Workplace maximum permissible noise exposure level versus daily exposure time.*

Duration (hr/day) Sound level (dBA)

Table 11.2. Workplace maximum permissible noise exposure level versus daily exposure time.*

Duration (hr/day) Sound level (dBA)

8

90

6

92

4

95

3

97

2

100

1.5

102

1

105

0.5

110

0.25

115

0.125

120

0.063

125

0.031

130

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