Mackie 406M, Owner'S Manual

Page: 3 / 36

3
Lend Me Your Ears
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.
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 Lori screaming at Ron about deadlines
0.5 110
0.25 or less 115 Loudest parts at a rock concert
Part No. 820-077-00 Rev. B 2/02
©2002 Mackie Designs Inc. All Rights Reserved.