As my title said, I have observed that left-clicking a worgen (only tested on the Bloodfang Forsaken Hunter outside Ruins of Southshore, on all sound channel options.) will provide the same voice volume no matter if you are 30cm from the NPC, or 50mtrs. I believe this is just a minor error in coding, but should be adressed nonetheless! Must say it scared me when it sounded like he sat right next to me. :P
I can create a short movie with the problem if required.