Sony MDR-NC20 Noise Canceling Headphones with Foldable Headband

around-the-ear, sealed earcup design * up to 10 dB reduction of ambient noise * on/off switch for passive (standard) or active (noise-canceling) operation * accepts "AAA" battery (not included) for noise-canceling operation * 5-foot cord with gold-plated stereo mini plug *

Retreat to a world of music, sleep on airplanes, or focus all your attention on study materials with Sony's stereo Noise-Canceling Headphones. They fit comfortably and have soft, high-quality speakers that completely cover your ears for an all-encompassing listening experience. Unlike lower-end models, these speakers don't pinch, leak sound, or cause pain with an in-ear insert. The noise-canceling feature blocks out 70 percent of all low-frequency sound. You'll still be able to hear someone speaking directly to you, but ambient noise--papers being ruffled, the rumble of an engine--disappears almost completely. Headphones plug into a Sony Discman, Walkman, and most other portable stereos or receivers. A mini jack allows you to plug the headphones into the standard jacks in airplane armrests, which will give you much better sound than the $5 disposables will for in-flight music services and movies. Sony's Noise-Canceling Headphones fold up for easy packing in a briefcase or carry-on luggage. One AAA battery is required to operate the noise-canceling function. --Cristina Vaamonde