(Disclaimer: God can speak whenever and however he chooses, but I would say the best place to host the Spirit of God if we want to hear Him speak is to be in silence.)
This is such an interesting concept because whenever I think about listening to something, I think about how there is an assumption within the definition of listening. I guess the assumption would be that when we listen, we need to be hearing something; there needs to be physical sound frequencies entering into our ears canal's. After reading this and thinking about it a lot, that is not the way to listen to God. Just as Tozer stated and as it says in Psalm 46:10, "Be still and know that I am God." The way to start listening to God is to be quiet. When I have a conversation with a person, just as it is with God, to hear them speak I must not be speaking or listening to anything else.
Let us listen to the God of all sound by closing our mouths, shutting our ears, and opening our hearts.