I have problem when I use mic in game. Mic is build in my laptop. If I use headphones, everyone will be able to hear me, If laptop's speakers are on - I have static and my voice is really low on the background.

My question is:

-Is there anyway for my windows/in game sounds to be disabled every time I hit voice_chat button in game. For example, I am playing, everyone is shooting around, I press K(by default) to talk, sounds disable and I transmit my message, when I  unpressed K - sounds turn back on... any ideas?