Originally Posted by charliex
I don't get the purpose of NC headphones when all they do is eliminate one kind of noise at the expense of a more bothersome other kind of constant background noise/hiss.
They take out lower rumble noises very effectively so that you can turn down the volume in the earpiece, so saving your hearing. At those kinds of noise levels, the hiss created by the electronics is normally drowned out I suppose. They're aimed at people on 'planes.
Other than NC, I prefer to use IEM's to cut out noise. No hiss and far more portable than the Senns.