Hi audioguru :) That microphone case is one of many that I made and tested ;), it's a lid from a deodorant aerosol tin, I used cloth stretched over the bottom that's held in place with a cabletie, I then used a type of rubberised foam to insulate the rest of it, which is held in place with electrical tape. The cloth almost eliminates friction noises, but in using the cloth the seal is no longer very good, and allows for some outside noises to be heard, but the rubberised foam that encase the rest of it, helps reduce outside noises. So there is a bit of a trade-off. I also tried using headphones that completely covered my ears, and Yes it did make a difference. Dazza :).