Mackie S500 Service Manual - page 2
2
Duration Per Day Sound Level dBA, Typical
In Hours
Slow Response
Example
8
90
Duo in small club
6
92
4
95
Subway Train
3
97
2
100
Very loud classical music
1.5
102
1
105
Patrice screaming about
deadlines
0.5
110
0.25 or less
115
Loudest parts at a rock concert
The S500 can
produce a
maximum SPL
of 127 dB @ 1m
SAFETY
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 this chart.
According to OSHA, any exposure in excess of these permissible limits could result in some
hearing loss. To ensure against potentially dangerous exposure to high sound-pressure
levels, it is recommended that all persons exposed to equipment capable of producing
these levels use hearing protectors while this unit is in operation. Ear plugs or 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
here.