Noise Canceling Headphones
Operating Instructions Manual de instrucciones
MDR-NC20
Owner’s Record
The model number is located at the rear side of the battery box.
The serial number is located at the both sides of the head band.
Record these numbers in the spaces provided below. Refer to them whenever you call upon your Sony dealer regarding this product.
Model No.
Serial No.
Features
• Noise canceling headphones reduce ambient noise, |
and provide a quieter environment to enhance audio |
entertainment. Ambient sound is synthesized with |
an |
canceling circuit, and reduced. (Over 10 dB is |
reduced at 300 Hz.) |
• Compact folding Style |
• Neodymium magnets are used to deliver powerful |
sound. |
• Operates as passive headphone when noise |
canceling circuit is not activated. |
Installing a battery
1Open the lid of the battery box on the right outer side of the headphone.
2Insert one R03 (size AAA) battery by matching the + and – on the battery to the + and – in the battery box.
Listening to music
1Connect the headphones to the AV equipment.
When connecting to dual or stereo mini jacks ofConnecting cord (supplied)
3Put on the headphones so that the ear pads cover your ears.
4Turn on the power of the AV equipment.
Notes on using on the airplane
•The supplied plug adaptor can be connected to dual and stereo mini jacks.
| dual jacks | stereo mini jacks |
• Do not use the headphones when use of electronic |
equipment is prohibited or when use of personal |
headphones for inflight music services is prohibited. |
Folding and unfolding the headphones
Unfolding
Folding
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.
Muffled sound
•Turn down the volume of the connected AV equipment.
•Replace the battery.
Specifications
Dynamic, closed
30 mm dia: dome type
24 ohms at 1 kHz (when the power is on) 56 ohms at 1 kHz (when the power is off)
© 1996 Sony Corporation Printed in China
English
WARNING
To prevent fire or shock hazard, do not expose the unit to rain or moisture.
To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel only.
WARNING
• Plug adaptor is supplied to connect directly to stereo |
or dual jack of inflight music services. |
• Plug types are compatible with Sony WALKMAN* |
remote controllers and stereo mini jacks of audio |
and visual equipment. |
* WALKMAN is a trademark of Sony Corporation.
3Close the lid.
Battery life
BatterySony alkaline LR03 (size AAA) battery
Sony R03 (size AAA) battery
40hours
20hours
2 Turn on the power of the headphones. |
The power indicator lights in red. When the |
power is turned on, ambient noise is reduced, and |
If you have any questions or problems concerning the system that are not covered in this manual, please consult the nearest Sony dealer.
After listening to music
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.
Precautions
•Clean the headphones with a soft dry cloth.
•Do not leave the plug dirty otherwise the sound may be distorted.
•Be sure to bring the headphones to a Sony dealer when requiring a change of ear pads or repair work.
•The CE mark on the unit is valid only for products marketed in the European Union.
•Do not leave the stereo headphones in a location subject to direct sunlight, heat or moisture.
102 dB/mW (when the power is on)
100 dB/mW (when the power is off) Frequency response
| 16 – 22,000 Hz |
Frequency range of active noise attenuation | |
| 40 – 1,500 Hz more than 10 dB at |
| 300 Hz |
Input cord | 0.5 m cord with a |
| microplug |
Power source | DC 1.5 V, 1 ⋅ R03 (size AAA) battery |
Mass | Approx. 175 g (6.2 oz) including |
| battery |
Connecting cord 1m (39 3/8 in.) (a
Carrying case (1)
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.
You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.
When to replace the battery
Replace the battery with a new one when the POWER indicator dims.
you can listen to music more clearly at a lower |
volume. |
OFF ON POWER
•The noise canceling function may not work properly unless the headphones are put on firmly.
•You can use the headphones without turning on the power. In this case, the noise canceling function is not active, and the headphones operate as passive headphones.
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 listen with the headphones while driving or cycling
As your headphones reduce outside sounds, it may cause traffic accident. Also avoid using them where hearing must not be impaired, for example, a railroad crossing, a site of construction, etc.
Operating instructions (1)
Design and specifications are subject to change without notice.