Block out everything you don’t want to hear when you put on the Philips Performance PH805BK Hi-Res Audio Headphones. These comfortable over-ear headphones offer active noise-canceling technology. That means they adjust to the environment around you so you never hear unnecessary background noise. But you’ll always hear the music. And you’ll hear it well, too, thanks to the 40-millimeter neodymium acoustic drivers. Certified for Hi-Res Audio, they produce all the right high and low notes. Additionally, these ANC headphones offer..