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11. Exposure to extremely high noise
levels may cause permanent hearing
loss. Individuals vary considerably
in susceptibility to noise-induced
hearing loss, but nearly everyone
will lose some hearing if exposed to
sufficiently intense noise for a period
of time. The U.S. Government's
Occupational Safety and Health
Administration (OSHA) has specified
the permissible noise level exposures
shown in the chart. According to
OSHA, any exposure in excess of
these permissible limits could result
in some hearing loss:
Duration,
per day in hours
8
6
4
3
2
1.5
1
0.5
0.25 or less
Sound
Level
90 dB
92 dB
95 dB
97 dB
100 dB
102 dB
105 dB
110 dB
115 dB
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