cancelling earphones are very handy for noisy environments like public tranport, sporting venues, noisy open office setups and especially airplane travel. They are so effective in cutting the background drone of engines etc.They also have an excellent sound output so that you can enjoy listening to your favourite music without the intrusion of any outside noises.These Noise Cancelling Earphones are very effective at ambient noise reduction. They are available at Amazon at a deeply discounted price;