Mackie MP-BTA - Noise and Hearing Safety; Permissible Noise Exposure Chart

Duration,
per day in hours
Sound
Level
8 90 dB
6 92 dB
4 95 dB
3 97 dB
2 00 dB
.5 02 dB
 05 dB
0.5 0 dB
0.25 or less 5 dB
. 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: