English
This
decibel
(dB)
table
compares
some
common
sounds
and
shows
how
they
rank in
potential
harm
to
hearing.
SOUND
NOISE
LEVEL
(dB)
Whisper
30
Very
quiet
Quiet
Office
50-60
Comfortable
hearing
levels
ore
under
60dB
Vacuum
Cleaner,
70
Intrusive; interferes
with
Hair Dryer
telephone
conversations
85 dB
is
the
level
at
which
hearing
damage
(8 hrs.)
begins
Garbage
Truck,
No
more
than
15
minutes
Cement
Mixer
of
unprotected
exposure
recommended
for
sounds
between
90-100dB
Power Sow,
110
Regular
exposure
to
sound
over
Drill/Jackhammer
100 dB
of
more
than 1 minute
risks
permanent
hearing
loss
Rock
Concert
(varies) 110-140
Threshold
of
pain
begins
around
125 dB
*Chart
information
from
http://www.
nidcd.
nih
.gov
/health/education/teachers/pages/common_sounds
.aspx
5
English
" .... a
typical
person
can
safely listen
to
an
iPod®
for 4.6
hours
per
day
at
70%
volume."
" ....
knowing
the
levels
one
is
listening
to
music
at,
and
for
how
long
is
extremely
important."
From
http:/
/www.cbc.ca/health/story/2006/l
0/19/music-earphones.html
Get
the
most
out
of
your
equipment
and
enjoy
great
audio
performance
even
at
safe levels.
Our
headphones
will
allow
you
to
hear
more
details
at
lower
volume
levels
than
ever
before.
Use Responsibly
Do
not
use
headphones
when
it's
unsafe
to
do
so-while
operating a vehicle,
crossing streets,
or
during
any
activity
or
in
an
environment
where
your
full
attention
to
your
surroundings
is
required.
It's
dangerous
to
drive
while
wearing
headphones,
and
in
many
places,
illegal
because
it
decreases
your
chances
of
hearing
life-saving
sounds
outside
of
your
vehicle,
such
as
another
car's
horn
and
emergency
vehicle
sirens. Please
avoid
wearing
your
headphones
while
driving.
Use
an
FM
transmitter
to
listen
to
your
mobile
media
devices
instead.
Learn
how
to
establish a safe
listening level
and
review
other
important
safety
guidelines
from
the
Consumer
Electronics
Association
at
www.ce.org
and
the
Deafness Research
Foundation
at
www.drf.org.
6