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Troubleshooting; Specifications - Sony MDR-NC200D Operating Lnstructions

Noise canceling headphones

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Precautions
The headphones
contain
a noise
canceling circuit.
What Is noise
ca
nceling
?
The noise
canceling
circuit
actually senses
outside noise
with
built-in
microphones and
sends
an
equal-but-opposite
canceling signal to the
headphones.
The noise canceling
effect
may not be pronounced in
a ve ry
quiet
environ ment,
or
some
noise may be heard.
• The noise
canceling
effect may
vary
depending on how
you
wear
the
headphones.
The noise canceling
function
works for noise in the
low
freque
ncy
band primarily. Although noise is reduced, it
is
not
canceled
completely.
W
hen
you
use the headphones in
a
train
or
a
car,
noise may occur
depending on street
conditions.
Mobile phones may
cause
interference and noise.
Should
this occur,
locate
the headphones further
away
from the mobile
phone.
Notes on usage
o
Clean
the headphones with
a soft
dry doth.
Do not leave the plug dirty
otherwise
the
sound
may be distorted.
• Be sure to consult
a Sony
dealer
when
the
earpads become dirty or
damaged, or
when
the headphones require repair work.
• Do not leave the
stereo
headphones in
a
location
subject
to dire<:t
sunlight,
heat or moisture.
o
Do not
subject
the
headphones
to
excessive shock.
o
Handle the driver units
carefully.
If
you
feel drowsy
or
~ick
while using these headphones,
stop
use
immediately.
Notes on headphones
Preventing
he
aring damage
A
void
using headphones
at
high
volume.
Hearing
experts
advise
against
continuous,
loud and extended play. If
you
experience a ringing
in
you
r
ears,
reduce the volume
or
discontinue
use.
Do not use headphones
while
driving and
cycling,
etc.
As
headphones
reduce
outside sounds, they may
cause a
traffic
accident. Also,
avoid
listening with your headphones in
situations
where hearing must
not
be
impaired, for example,
a rail
road crossing,
a
construction site, etc.
Note on static electricity
In particularly dry air conditions, noise or
sound skipping
may
occur,
or
m
ild tingling may be felt
on your
ears.
This is a result
of static
electricity
accum ulated
in the body, and not
a
malfu
nction of the
headphones.
The
effect can
be minimized by wearing clothes made
from
natural
materials.
If
you
have any questions
o
r
problems concerning
the
system
that
arc
not
covered in
this manual, please
consult
the nearest
Sony
dealer.
Troubleshooting
No sound
o
Replace the
battery.
You
can
use the headphones even
without
turning
on the power. In this
case,
the noise
cancel
ing
fu
nction, Digital
Equalizer and
Master arc not active, and the
headphones operate as
passive headphones.
o
Check the
connection
of
the headphones and the
AV
equipment.
o
Check
that the
connected
AV
equipment
is turned on.
Turn up the volume
of
the
connected
AV equipment.
Check
if the MONITOR function
is
on
(the
indicator blinks
slowly).
Press the MON ITOR button to turn
it
off.
The noise canceling effect is not sufficient
o
The noise
canceling function is effective
in low frequency ranges such
as ai rplanes, trains, or offices
(ncar
air-conditioning, etc.)
and
is not as
effective
for
higher
frequencies,
such as
human voices.
Turn
on
the
headphones.
Distorted sound
o
Turn down the
volume
of the
connected
AV
equipment.
Power does not turn on
o
Check
if the
battery
has expired
(the
POWER indicator lights off).
Replace the battery with a new one
No operation works
o
Set
the
POWER
switch
of
the
headphones to
"OFF", confirm
the
connections,
and
then
set
the POWER
switch
back to
"ON"
Specifications
Ge
neral
Type
Dynamic, dosed
Driver units
10 mm, dome type
(CCAW adopted)
Power
handling capacity
SOmW
Impedance
68
Qat I kHz
Sensitivity
(when
the
power is on)
350at
I kHz
(when
the power
is off)
103 dB/mW (when the power
is on)
102 dB/mW {when the power is
off)
Frequency response
8
Hz
-
23,000 Hz
Total
Noise Suppression
Ratio•'
Approx.
17.5dB*l
Power
source
DC 1.5
V,
I
X LR03
(size A A
A)
battery
Mass
Approx. ISO g (6.4
oz)
Included items
Headphones
(
!)
Plug adaptor for
in-flight
use•J
(single/dual) (I)
Connecting
cord
(1.5
m,
gold
plated L
type stereo
mini plug)
(I)
Carrying case(l)
Sony LR03 (size
AAA)
battery
(I)
Operating Instructions(!)
Warrantycard {l)
'
'
Under the Sony measurement
standard.
'
'
Equivalent
to approx.
98.2%
reduction of energy of sound compared
with
not
wearing headphones
J
May
not
b-e compatible
with
some
in-flight music
services.
Design
and
specifications are subject to
change without notice.

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