Download Always wear hearing protection for loud noises such as gunfire or

How Noise Affects Hearing
Your ear is a delicate
instrument. Tiny “hair
cells” in the inner ear
vibrate when sounds
reach them. Hair cells
relay sound to the brain
through the auditory
nerve.
Loud or frequent noises
damage the hair cells.
Over time, excessive noise
may cause the cells to die.
Then the auditory nerve
can’t pick up the sound
and relay it to the brain.
Very loud noises, such
as jet engines and gunfire, can damage hearing
very quickly.
Other noises damage
only after you’ve been
around them for hours.
A noise that is 85 decibels won’t hurt you in
the short run, but if
you’re around it for eight
hours or more, you need
hearing protection.
4
3
..
Noise is measured in units called
.
.
.
...
.
.
decibels. Here are some decibel ...
0
.6
.
m
.
n
oo
tio
levels of common noises:
a
tR
s
r
e
ve
ui
A
Q
al
rm
No
to
Au
n
Co
.
....
c..
affi
Tr
5
...7
...
....
....85
......
.......
g.....
in
Sand
.............90
Subway.........
Woodworkin
g Tools.....10
0
Powe
Gu
r Saw
nfir
e...
.......
....
....
.......
....
....11
0
....
....1
20
Always wear hearing protection for loud noises
such as gunfire or prolonged noises such as shop
tools and machinery.
SAFETY HAZARDS
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