Maybe they just walk around and not making any sounds except walking sounds . and when you look at them they start to whisper louder and louder and when they teleport or attack you they sort of scream.
Well during the PAX demo they made zombie sounds, which greatly irritated me to hear. I know they're not going to keep it that way, but hearing the sounds recycled just made me twitch a little :tongue.gif:
When there are some nearby, you should hear a deep and creepy 'breathing out' sound. As soon as you look at them, you shouldn't hear them breath anymore. There should be a deadly silence. That's right. And when they attack, they should make another, more aggressive sound.