300 kJ/m
MD CD DAT
1
2
4
3
*
1
4
LR03/AM-4 N
40 *
2
4
R03/UM-4 NU
20 *
2
*
1
1 kHz 0.1 mW 0.1 mW
*
2
POWER
1
AV
2
R L
3
P OWER ON
POWER
ON POWER
OFF
POWER
POWER
4
AV
POWER ON
MONITOR
MONITOR
MONITOR
POWER OFF
POWER OFF
POWER ON
POWER OFF
AV
AV
AV
AV
TV
30 mm CCAW
50 mW
68 ON 1 kHz
30 OFF 1 kHz
102 dB/mW ON
100 dB/mW OFF
14 Hz 22,000 Hz
(TNSR)*
1
10 dB*
2
1.5 m OFC
DC 1.5 V 4 1
110 g
4
80 g
4
4 1
1
*
3
1
1
1
*
1
*
2
ON
10 dB 90 %
*
3
WALKMAN WALKMAN
CE EEA European
Economic Area
http://www.sony.co.jp/avp-regi/
http://reg.msc.m.sony.jp/avp/
3-282-466-24(1)
Noise Canceling
Headphones
©2008 Sony Corporation Printed in Malaysia
JP
Operating Instructions GB
MDR-NC40
English
Noise Canceling Headphones
Before operating the unit, please read this manual
thoroughly and retain it for future reference.
WARNING
To reduce the risk of fire or electric
shock, do not expose this apparatus to
rain or moisture.
To reduce the risk of electrical shock, do
not open the cabinet. Refer servicing to
qualified personnel only.
You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate this
equipment.
The validity of the CE marking is restricted to
only those countries where it is legally enforced,
mainly in the countries EEA (European Economic
Area).
Features
Noise canceling headphones reduce unwanted
ambient noise and provide a quieter
environment to enhance your listening
experience. Ambient sound is reduced by
synthesizing with a sound in opposite phase
produced by the noise canceling circuit.
Lightweight design for long lasting wearing
comfort.
Super compact foldable design for carrying and
storing.
Soft and comfortable fit from pressure-relieving
urethane ear cushion.
Built-in monitor function to hear surrounding
sound.
Supplied plug adaptor for easy connectivity to
stereo mini or dual jacks for in-flight music
services.
Operates as passive headphones when noise
canceling circuit is not activated.
Installing a battery
1
Push and slide the compartment lid on
the rear of the battery box fully, and open.
Before opening the compartment lid,
check that the claws of the lid are seen.
Claws
2
Insert one R03 (size AAA) battery,
matching the on the battery to the
in the battery compartment.
Insert the end first.
3
Close the lid.
Battery life
Battery Approx. hours*
1
Sony alkaline battery
LR03/AM-4 (N)
40 hours*
2
Sony battery R03/UM-4
(NU)
20 hours*
2
*
1
1 kHz, 0.1 mW + 0.1 mW output
*
2
Time stated above may vary, depending on the
temperature or conditions of use.
Note
Because the supplied battery was included in the
package from the time of manufacture (as a
convenience to the user), it is possible that the
battery life may be somewhat depleted by the time
of purchase. The actual life of the supplied battery
may be shorter than the standard time described
in this manual when using a fresh battery.
When the battery is low
Power indicator dims, and the noise canceling
function is deactivated. Replace the battery with a
new one in this case.
Unfolding the
headphones
Storing the headphones in the carrying
case
When storing the headphones in the supplied
carrying case, set the inner partition up, fold the
headphones and store.
The plug adaptor and reserve battery can also be
stored in the pockets of the carrying case.
Listening to music
1
Connect the headphones to the AV
equipment.
Plug adaptor (supplied)
When connecting to dual or
stereo mini jacks of in-flight
music services.
To headphone jacks on
airplane seats
When directly connecting to the
headphone jack (stereo mini
jack) of a “WALKMAN”, etc.
When connecting to a remote
commander with a stereo mini
jack of a “WALKMAN”, etc.
Remote commander
2
Wear the headphones marked R in your
right ear and the one marked L in your
left ear.
3
Turn on the power of the headphones.
The power indicator lights in red. The
power switch is located on the battery
box. When power is turned on, ambient
noise is reduced, and you can listen to
music more clearly at a lower volume.
Power indicator
Power switch
4
Start playing on the AV equipment.
To hear ambient sound for safety
When the power switch is set to on, noise
canceling can be deactivated while the MONITOR
button is pressed so that you can hear ambient
sound.
MONITOR button
When using in an airplane
The supplied plug adaptor can be connected to
the dual or stereo mini jacks in an airplane.
dual jacks
stereo mini jacks
Do not use the headphones when use of
electronic equipment is prohibited or when use
of personal headphones for in-flight music
services is prohibited.
If you have any questions or problems concerning
the system that are not covered in this manual,
please consult the nearest Sony dealer.
After use
Turn off the power of the headphones.
Notes
The noise canceling function is only effective for
noise in the low frequency band. Although noise is
reduced, it is not canceled completely.
Do not cover the microphone of the headphones with
your hands. The noise canceling function may not
work properly.
Microphone
The noise canceling function may not work properly
unless the headphones are put on firmly.
You can use the headphones even without turning on
the power. In this case, the noise canceling function is
not active, and the headphones operate as passive
headphones.
After you turn on the power of the headphones, you
may hear a slight hiss. This is the operating sound of
the noise canceling function, not a malfunction.
In a quiet place, or depending on certain noises, you
may feel that the noise canceling function is not
effective, or that noise is accentuated. In this case,
turn off the power of the headphones.
Using the clip
You can fasten the battery box by its clip on a shirt
pocket.
Clip
Precautions
Do not put weight or pressure on the
headphones as it may cause the headphones to
deform during long storage.
The earpads may deteriorate due to long-term
storage or use.
Be careful not to catch your finger as you fold
the headphones.
Clean the headphones with a soft dry cloth.
Do not leave the jack plug dirty otherwise the
sound may be distorted.
Be sure to bring the headphones to the Sony
dealer when requiring a change of earpads or
repair work.
Do not leave the headphones in a location
subject to direct sunlight, heat or moisture.
Do not subject the headphones to excessive
shock.
Handle the driver units carefully.
If you fell drowsy or sick while using these
headphones, stop use immediately.
Mobile phones may cause noise. Keep the
headphones away from mobile phones.
If headphone sound is noisy, move the battery
box away from sources of interference, such as a
radio, etc.
Notes on headphones
Preventing hearing damage
Avoid using headphones at high volume. Hearing
experts advise against continuous, loud and
extended play. If you experience a ringing in your
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 railroad crossing,
a construction site, etc.
Troubleshooting
No sound
Check the connection of the headphones and
the AV equipment.
Check that the connected AV equipment is
turned on.
Turn up the volume of the connected AV
equipment.
Replace the battery.
Muffled sound
Turn down the volume of the connected AV
equipment.
Replace the battery.
The sound of the connected source
device, such as radio and TV, cannot be
heard, or headphone sound is noisy.
Move the battery box away from the connected
source device.
Specifications
General
Type Closed, dynamic
Driver unit 30 mm, dome type (CCAW adopted)
Power handling capacity
50 mW
Impedance 68 Ω at 1 kHz (when the power is on)
30 Ω at 1 kHz (when the power is off)
Sensitivity 102 dB/mW (when the power is on)
100 dB/mW (when the power is off)
Frequency response
14 Hz - 22,000 Hz
Total Noise Suppression Ratio*
1
:
Approx. 10 dB*
2
Cord Approx. 1.5 m OFC litz cord
(including battery box)
Power source DC 1.5 V, 1 × R03 (size AAA) battery
Mass Approx. 110 g including battery box,
cord, and battery
Approx. 80 g not including battery
box, cord, and battery
Supplied accessories
Sony R03 (size AAA) battery (1)
Carrying case (1)
Plug adaptor for in-flight use*
3
(single/dual) (1)
Operating Instructions (1)
Card warranty (1)
*
1
Under the Sony measurement standard.
*
2
Equivalent to approx. 90 % reduction of energy of
sound compared with not wearing headphones.
*
3
May not be compatible with some in-flight music
services.
Design and specifications are subject to change
without notice.
“WALKMAN” and “WALKMAN” logo are registered
trademarks of Sony Corporation.
/