I know I made a post about this at some point in life, but I can't find to bump it - SO HERE'S ANOTHER ONE!
Tired of not being able to hear our beautiful voices on Teamspeak due to the sounds of 'splodey imperials? Download Volume Control!
http://addons.teamspeak.com/directory/plugins/miscellaneous/Volume-Control-(Windows-only).html
This is a teamspeak plugin which will make everything else quiet when you (or someone else) is talking in teamspeak. Try it, love it.