NOTE: It is quiet normal for heaphones plugged into a computer, when not playing any kind of sounds, to have a static like sound on them.
Here are some things to try.
1. Make sure that the wires for your headphones do not come into contact with other wires going in and out of the computer. Anything it touches that can have any kind of electrical current can cause noise in the headphones.
2. Try a different headphone jack, if you have more than one.
3. Try a different set of headphones and see if they have the same sound problem.
4. Plug the headphones into a different device and see if you get the same sound issues. If so, it may be within the speakers themselves.issue.
5. Connect the headphones through a USB connection (this...