Dannys right, Team Speak is much better the Skype. Skype dosnt have PTT. PTT is Push To Talk. This means that Skype is all ways listing to, and broadcasting your mic. So if you sneeze, we all hear it.
But TS has PTT, meaning you have to push and hold a button to talk. This simulates having to hold the mic button on a hand set radio in your cab. If you sneeze, have a conversation with some one in the room, we dont hear it. Unless you push the "talk" button. Now you can map any key to that button.