dramatic irony is a stylistic device that is most commonly used by storytellers, in plays, in the theater, and in movies.
This quote expresses how uncomfortable the author is ("TOO" close) and emphasises that by saying it's buzz is the 'only' noise in "the author's world".
Other quotes:
"Stories don't end," he says. "They just turn into new beginners." -page 123
"What's scarier than death? Not living." -unknown page