Hi I need headphones for my work environment. it is very common for workers in my office to sit with headphones in front of the computer. the noises I'm trying to reduce: a guy whistling his favorite song a few feet away from me, a guy stomping his feet and drumming with pens and pencils on his table right next to me, a girl popping her gum, and another girl clapping every time she makes a sale (about one every 30 minutes) and more. because of these noises are random - I doubt an active noise cancellation headphones will work here and think a passive noise reduction headphones will do better. (I may be wrong). which passive noise reduction headphones can block the noise the most? which ones are leading? the quality of the sound of the headphones are not that important. I only want to hear music in order to more block the noise from the outer world.