Sony MDR-NC40 Noise-Canceling Dynamic Stereo HeadphonesEnjoy hours of peaceful music listening using Sony's MDR-NC40 headphones. These noise-canceling headphones block out up to 80% of ambient noise, so you can hear details in your music at lower volumes and save your ears the stress. The lightweight headband and urethane-cushioned earpads reduce the pressure on your head, allowing you to listen comfortably for extended periods of time. The compact design makes these headphones easy to travel with, and the included twin-plug airline adapter lets you turn an otherwise noisy flight into an hour or more of relaxation. The high-quality 30mm drivers with neodymium magnets faithfully reproduce your music, whether you turn the noise-canceling circuitry on or off. One "AAA" battery gives you up to 40 hours of active noise cancellation. Sony MDR-NC40 Noise-Canceling Dynamic Stereo HeadphonesFeaturescompact, folding, on-the-ear design urethane-cushioned earcups and adjustable headband on/off switch for passive (standard) or active (noise-canceling) operation impedance: 68 ohms up to 14 dB reduction of ambient noise frequency response 14-22,000 Hz in-line battery case with belt clip 4.9-foot cord with L-shaped stereo mini plug up to 40 hours battery life weight 2.9 oz. (not including cable and battery pack)SpecificationsTypeDynamic, closedDriver Unit30mm, dome typeImpedance68 ohms at 1k power on 38 ohms at 1k power offSensitivity102 dB/mW power on 100 dB/mW power offWeight2.9 oz. not including batteryPower sourceDC 1.5V (1 AAA battery supplied)Battery LifeAlkaline = approx. 40 hours, Regular = approx. 35 hoursFrequency range of active noise attenuation40-1,500 Hz, >14.0 dB at 300Hz
Enjoy hours of peaceful music listening using Sony's MDR-NC40 headphones. These noise-canceling headphones block out up to 80% of ambient noise, so you can hear details in your music at lower volumes and save your ears the stress. The lightweight headband and urethane-cushioned earpads reduce the pressure on your head, allowing you to listen comfortably for extended periods of time.
The compact design makes these headphones easy to travel with, and the included twin-plug airline adapter lets you turn an otherwise noisy flight into an hour or more of relaxation. The high-quality 30mm drivers with neodymium magnets faithfully reproduce your music, whether you turn the noise-canceling circuitry on or off. One "AAA" battery gives you up to 40 hours of active noise cancellation.
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