Headphones For Noisy Environments?

Here's another query from an Anonymous Coward with ringing ears: "I may be forced to spend a lot of time in a computer machine room soon, and was thinking of using some noise-cancellation headphones (like those made by Sony or BOSE). Unfortunately, I must spend a lot of time on the telephone. I can try and hack one of the airplane model units BOSE makes (which also has a built in boom microphone) to interface to a telephone, but it occurred to me maybe someone knew of something better that already exists? It would be nice to be able to listen to music when I'm not on the telephone..."