How do I get rid of the constant buzzing on these headphones

Bad grounds or connections in the headphones. Try with another set. Or if it is new, something damaged in transit like a loose board.

take it in for a warranty check or replacement

I need more information are the wires connected the right way? if not then revers them it is a bit hard to give you a answer good luck.

Could be a bad ground and or a bad condensor.

Any foreign bodies inside the driver bay, or something magnetic? Just a thought.

Unless they've beed damaged though being overdriven

To get rid of the buzzing sound just go to walmart and in the car stereo section buy the $10 rca ground loop isolator, this is the best way to get rid of amp noise

I had this problem a few months ago, make sure the small wheel on the side is set on A. (if you look closly at the wheel there are very small and hard to see letters on there.) this should get rid of the buzzing.

can not make an outgoing phone call with my samsung saga phone using cobra cbth1 bluetooth headset

Does it stop if you mute the system?

Find a pair of headphones and plug them into the laptop and see if the buzzing continues in the headphones. If it does, it's a driver problem. Uninstall Audacity (which I don't think works too well with Vista, unless they've released a new version) to see if the problem goes away. If the buzzing is only occuring on your laptop speakers, but not in the headphones, then you may have blown them by using the wrong impedance out of your amp...

I rather suspect it's an audio driver problem. What happens when you remove Audacity?

It is normal with xbox 360 it is just your system cooling down...