I've tried finding some but maybe someone can point me in the right direction, and im sure it must be possible. I want a noise cancelling app. maybe also with the option to listen to music at the same time. I work in a room with some ppl that just don't know how to be quiet and i like to sit with my head burried in designing ms access db's, i like to concentrate on it undisturbed. i've tried to find apps searching for noise cancelling, noise reduction, noise block, sound block, etc, closest i could find was one that blocked out vuvzela noise, you listened to your tv through the headphones and could filter out that noise. but i want to be able to just pop headphones in and it cancels out all external noise so i can be in silence, or it work on with me listening my ipod library. This must be possible if not already done and i cant find it. Please help my productivity... sorry, i've posted this in the ipad apps, i want it for iphone 4, if someone could move it it'd be great!