Comment 2 for bug 255787

I'd say this bug is likely a duplicate of bug #242966. To be sure that things get completely fixed however, I suggest the following steps:
1. Go to a terminal, and kill pulseaudio, making sure no other audio using applications are open. "pulseaudio -k"
2. Delete all pulseaudio related files from your home directory, "rm -r .pulse*" should do it.
3. Reset your sound card volume settings. This will reset the PC speaker's volume to be muted and at zero. "sudo /etc/init.d/alsa-utils reset"
4. Log out and back in, and the static should be gone.

Please note that the above steps should be carried out with all the latest updates for intrepid.

Hope this helps.