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The US Government's Occupational Safety and Health Administration
(OSHA) has specified the following permissible noise level exposures:
Duration Per Day In Hours
Sound Level dBA
8
90
6
92
4
95
3
97
2
100
1.5
102
1.0
105
0.5
110
0.25
115
According to OSHA, any exposure in excess of the above permissible limits
could result in hearing loss. Ear plug protectors in the ear canals or over the
ears must be worn when operating this amplification system in order to
prevent a permanent hearing loss if exposure is in excess of the limits set
forth above. To ensure against potentially dangerous exposure to high
sound pressure levels, it is recommended that all persons exposed to
equipment capable of producing high pressure sound levels such as this
amplification system be protected by hearing protection while this unit is in
operation.
