Alright so two days ago I left the game and team speak running and went away for sometimes. When I returned there was no sound at all from my computer. I turned on troubleshooting audio playback and sound was fixed. Still my teamspeak sound can't be heard. Also reinstalling TeamSpeak didn't help either.
When you open TS , click on " Settings " , then " Options ". Then click on " Playback" , and check your settings. If you're done with editing something there , you could test it too.