As for the sound, because they physically and by frequency are designed to cancel out background noise you can only imagine how rich sound is when you've got the Creative EP-3NC headphones on. I would put the sound quality on par with the Creative Aurvana Air that I reviewed only a week or so ago. Bass was huge and treble crisp.
Creative EP-3NC is a must to have if you travel frequently either on foot or on a public transport because the active noise cancellation really works - it's as if the whole world has been muffled.
The Creative EP-3NC earphones combine well-balanced sound quality with incredibly effective noise cancellation.
Have used normal noise cancelling headphones on numerous flights. They do a good job but I find it difficult to sleep with them on. I therefore decided to try noise cancelling earphones as they allow you to rest on your side more comfortably. The Creative EP-3NC fitted the bill regarding price and performance and on a recent flight I found them to be a great alternative to my headphones.