Although the noise cancellation feature of these headphones is great when coupled with music, they're not "noise cancelling" enough to actually create complete silence.

, loud noises like a car going by

- I work in a giant, crowded, open-office bullpen surrounded by speaker phones, so I need good noise cancelling headphones that I can comfortably wear for 8+ hours at a time, and these are definitely qualified.

The noise canceling works well

I use them many hours a day wired and wireless and the sound quality is just as great, and the design itself provides great noise cancellation, even with the NC off