With your headphones on, all you want to hear is the music. That¡¯s it. But on trains, buses and planes, and when you¡¯re out and about, there¡¯s a lot of other noise competing for your attention. Noise-cancelling headphones cut out annoying, low-frequency background noise by analysing and cancelling out the intruding sounds. So your music will be dramatically clearer and more enjoyable, even at low volumes.