How to mute other players in fifa 2012?

Hello guys,
Tell me more on how to mute other players in FIFA 2012? This is one of my favorite game in the whole gaming world but there are some things that I still don’t know such as some setup and any other features like adjusting graphics and most especially on how to mute other players in FIFA 2012? Can you give me some ways that will make this possible?
Thank you.
