Dictionary.com defines the noun "white noise" this way: Also called white sound. a steady, unvarying, unobtrusive sound, as an electronically produced drone or the sound of rain, used to mask or obliterate unwanted sounds.
We can have theological white noise as well. We drown out the gospel with discussions on other topics. We sound like we are talking about important things, but it is mostly white noise, avoiding Jesus.
Systematic theology is white noise. It is the discussions about God that takes place between the proclamation of God. Even as Christians, we keep Jesus at arm's length. We don't want to hear the real message, so we discuss things that keep Jesus away.
Systematic theology can be used to drown out the real message of God. What is the real message?
The proclamation of the gospel of our Lord and Savior is the real message. That Jesus has reconciled us, and we are free. Be reconciled!
Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation; that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation. ~ 2 Corinthians 5