There are a bunch of reasons why zombies on "Walking Dead" are called "walkers," but mostly it's because they're slow as hell.
Walkers are also extremely loud. They constantly make this guttural sound like they're trying to hawk up a loogie but just can't, which could also explain why they're so cranky.
Despite all this, the zombies on the show seem to move around like military black ops. They pop up around corners, they reach out and grab people from the trees and just suddenly show up out of nowhere and eat everything like an unwanted college friend. And everyone's always surprised until they're already eating their faces off.
To some it seems like a big plot hole that walkers can move around with such stealth, but it turns out there could be a logical explanation after all:
The explanation: Walkers get so close unnoticed because everyone has massive hearing loss from all the guns they fire without ear protection.
The theory was posted on Reddit recently, and it does make a lot of sense. The Redditor explains: