The illusion of soundstage.

So what i really was looking for was how, physically, sound waves can appear to be originating from outside the width of the transducers. i can imagine with an electrostat... but in phase or not, how does the wave(?) appear to come from  a different place. i am a visual thinker and want some sort of representation in that sense. thanks for all of the replies btw

ahhhh! now i see. comb filtering dammit. that is great info guys! so its really all in my head , literally. makes sense. i knew there was more to it than simple external physics of sound waves, our ears are not the instruments we think they are. or at least not the simple conical sound gatherers with no other factors coming to bear.