The Knife of Never Letting Go by Patricia Ness

Chased by a madman preacher and possibly the rest of his townsfolk as well, young Todd Hewitt flees his settlement on a planet where war with the natives has killed all the women and infected the men with a germ that broadcasts their thoughts aloud for all to hear. This cacophonous thought-cloud is known as Noise and is rendered with startling effectiveness on the page. The first of many secrets is revealed when Todd discovers an unsettling hole in the Noise, and quickly realizes that he lives in a much different world than the one he thought he did. This is the first book in the Chaos Walking series.