Bose QuietComfort 2 Acoustic Noise Canceling Headphones (1407-332)

Description

Bose’s QuietComfort 2 (QC2) headphones belong to a group of headphones we call “travel” or “noise-isolation” headphones—models designed to reduce the amount of external noise you hear, letting you relax and enjoy your music while in noisy environments like planes, trains, busy city streets, or even buzzing offices. Passive noise-isolation headphones aim to physically block external noise from reaching your eardrums by either sealing in your ear canals like earplugs (these models are often called canalphones ) or by enclosing your ears completely. Active noise-isolation models take a different approach: They use special “noise-canceling” (NC) circuitry that listens for external noise via microphones on the headphones and then produce an audio signal that represents the inverse of that external noise, effectively canceling it. What you’re left with is the music—and usually a slight “hiss.” (The intensity of the latter depends on the quality of the noise-canceling circuitry.)