Now I dunno if you can take my word or not but I am gonna say this. On another server I play with MeSu sometimes hes kinda my friend and when i spec him he never wh. Also he use loud sound and he is extremely pro. Also another piece of evidence, like me he games on a mac which mean he can't install hacks due to all hacks only for PC.
Also Jo, if you have headphones or ear phones you can hear the direction someone is coming from due to the sound coming from left or right of headphones. or both which would mean straight ahead. I use that trick :3 Luv it.