volume and projection, while often going hand in hand do not necessarily do so (at least that seems to be the case for me)

I can't tell you *HOW* - but I sometimes go for volume (almost always a mistake)- sometimes for projection - and they have completly different "feels" - and I know I can project widely for much longer then I can hike the volume.

Clarity is a lot of it - and something about the tone (not pitch - but tone)