When a zombie starts one of its growls, the direction of the sound is correct. However, the direction stays like that for the whole duration of the growl. For example, there is a zombie to my right. I am walking past it. It starts a long growl. I can tell initially where the sound is coming from, and I turn toward the zombie to look at it. But, no matter which way I turn or move, for the whole duration of the sound clip, I will continue to hear the sound coming from my right. Hope I explained this well enough.