Board Thread:Dark Souls/@comment-63.153.23.3-20130729052232/@comment-24084837-20131115160151

phantoms are not entirely silent, you can hear the "breathing" of the invader/summon albeit the later is harder as an invader as your own breahing occrs for you too.

hosts can be tracked down by this method too, distinctive enough to tell apart from phantom breathing. unknown if slumbering dragon crest ring affects this but ring of fog does not.