Ouch - something must be very bad to yield so much noise. It might be worth running the headphones through a mixer instead of straight into the computer. If you want a pro solution, it starts at $59: <a href="http://www.soundprofessionals.com/cgi-bin/gold/category/110/mics" rel="nofollow">http://www.soundprofessionals.com/cgi-bin/gold/category/110/...</a>