Originally Posted by Mellonc

+1 on this brand. I have the HF 5 and I won't say they are the best headphones. but they do block the noise on the middle and upper frequencies.

the QC series of headphones are nice but I have dog hearing. I can hear the out of phase noise that is supposed to cancel the noise. this gets worse, when my headset touches the seat or any part of the airplane. so, unless i'm sitting straight up like a good student in 4th grade, I have to use the noise isolators....