Sony Headphones MDR NC40 User Manual

• 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.  
• Mobile phones may cause interference and noise. To avoid  
interference, use noise canceling feature only with wireless  
transmitters turned off (Airplane Mode). Interference noise  
can also occur from nearby mobile phones. Should this occur,  
locate the headphones further away from the mobile phone.  
3-282-466-31 (2)  
Listening to music  
1
Connect the headphones to the AV equipment.  
Noise Canceling  
Headphones  
When connecting to dual or  
stereo mini jacks of in-flight  
music services.  
Plug adaptor  
(supplied)  
Using the clip  
Operating Instructions  
You can fasten the battery box by its clip on a shirt pocket.  
Manual de instrucciones  
To headphone jacks  
on airplane seats  
Clip  
When directly connecting to  
the headphone jack (stereo  
mini jack) of a WALKMAN *,  
etc.  
Precautions  
MDR-NC40  
© 2008 Sony Corporation Printed in Malaysia  
• 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.  
When connecting to a remote  
commander with a stereo  
mini jack of a WALKMAN *,  
etc.  
• Be careful not to catch your finger as you fold the  
headphones.  
English  
• Clean the headphones with a soft dry cloth.  
• Do not leave the jack plug dirty otherwise the sound may  
be distorted.  
Battery life  
• 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.  
Remote commander  
Battery  
Approx. hours*1  
40 hours*2  
WARNING  
Sony alkaline battery LR03/  
AM-4 (N)  
To reduce the risk of fire or electric  
shock, do not expose this apparatus to  
rain or moisture.  
2
3
Wear the headphones marked R in your right  
ear and the one marked L in your left ear.  
Sony battery R03/UM-4 (NU)  
20 hours*2  
1
*
*
1 kHz, 0.1 mW + 0.1 mW output  
Time stated above may vary, depending on the temperature  
or conditions of use.  
• If you fell drowsy or sick while using these headphones,  
stop use immediately.  
2
To reduce the risk of electrical shock, do  
not open the cabinet. Refer servicing to  
qualified personnel only.  
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.  
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.  
This device complies with Part 15 of the FCC Rules.  
Operation is subject to the following two conditions: (1)  
This device may not cause harmful interference, and (2) this  
device must accept any interference received, including  
interference that may cause undesired operation.  
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.  
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.  
You are cautioned that any changes or modifications not  
expressly approved in this manual could void your authority  
to operate this equipment.  
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.  
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).  
Unfolding the  
headphones  
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.  
Features  
Power indicator  
Power switch  
• Noise canceling headphones reduce unwanted ambient  
noise, providing a quieter environment to enhance your  
listening experience.  
4
Start playing on the AV equipment.  
,
,
• Lightweight design (less than 3 oz. for headphones  
portion) reduces stress on head.  
• Soft and comfortable fit from pressure-relieving urethane  
ear cushion.  
• Compact, folding design convenient for travel use.  
• Compact battery box with monitor function to silence the  
audio and listen outside.  
* “WALKMAN” and “WALKMAN” logo are registered  
trademarks of Sony Corporation.  
Muffled sound  
• Turn down the volume of the connected AV equipment.  
• Replace the battery.  
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.  
Specifications  
General  
Installing a battery  
Type  
Closed, dynamic  
1
Push and slide the compartment lid on the rear  
of the battery box fully, and open.  
Driver unit  
30 mm, dome type (CCAW adopted)  
MONITOR button  
Power handling capacity  
50 mW  
Before opening the compartment lid, check that  
the claws of the lid are seen.  
When using in an airplane  
• The supplied plug adapter can be connected to the dual or  
stereo mini jacks in an airplane.  
Impedance  
68 at 1 kHz (when the power is on)  
30 at 1 kHz (when the power is off)  
102 dB/mW (when the power is on)  
100 dB/mW (when the power is off)  
Sensitivity  
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.  
Frequency response  
14 - 22,000 Hz  
Frequency range of active noise attenuation  
40 – 1,500 Hz more than 14 dB at  
300 Hz  
dual jacks  
stereo mini jacks  
Cord  
Approx. 1.5 m (59 1/8 in) OFC litz cord  
(including battery box)  
• 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.  
Power source  
Mass  
DC 1.5 V, 1 × R03 (size AAA) battery  
Approx. 110 g (3.9 oz) including battery  
box, cord, and battery  
Claws  
If you have any questions or problems concerning the  
system that are not covered in this manual, please consult  
the nearest Sony dealer.  
Approx. 80 g (2.9 oz) not including  
battery box, cord, and battery  
m
Supplied accessories  
Sony R03 (size AAA) battery (1)  
After use  
Turn off the power of the headphones.  
Carrying case (1)  
Plug adaptor for in-flight use* (single/dual) (1)  
Operating Instructions (1)  
Notes  
• The noise canceling function is only effective for noise in the  
low frequency band. Although noise is reduced, it is not  
canceled completely.  
* May not be compatible with some in-flight music services.  
• Do not cover the microphone of the headphones with your  
hands. The noise canceling function may not work properly.  
Design and specifications are subject to change without  
notice.  
2
3
Insert one R03 (size AAA) battery, matching the e  
on the battery to the e in the battery compartment.  
Microphone  
m
Insert the E end first.  
• The noise canceling function may not work properly unless  
the headphones are put on firmly.  
Close the lid.  
• 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.  
 

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