Sound Echo

Lately, I've been experiencing this odd audio bug that I can't seem to google/find any information on. Essentially, there's this nonstop echo of a single sound that only disappears briefly when I change maps. Any other sounds, like swinging a weapon, etc, echo as well. I've tried reinstalling drivers, though I have not made an attempt to reinstall the game yet. I'm finding it difficult to articulate exactly what this sound is, but even when I mute sound, I can still hear it sometimes. I don't suppose anyone else has run into this and is familiar with some form of fix?