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I think I found that Scientific American article if anyone is interested. Unfortunately it's archived on their pay-to-download section, though knowing which issue it's in may make it accessible at your local library. <http://www.sciamdigital.com/browse.cfm?sequencenameCHAR=item2&methodnameCHAR=resource_getitembrowse&interfacenameCHAR=browse.cfm&ISSUEID_CHAR=2AA69C4D-56CA-4FCC-A355-83E902C96FB&ARTICLEID_CHAR=FCF0925D-F268-4E72-A095-5FA384AA9E8&sc=I100322> Eventually I'll get around to digging through my back issues to take a look for myself, but for the time being, I'm 90% sure that's the article. Enjoy, Todd On 11/23/05, Todd Pafford <calenlas@gmail.com> wrote: > I read an interesting article a couple of years back in Scientific > American about a guy who was working on analyzing and modelling the > way our ears locate sound. I recall there being a good description > about the way in which the asymetrical shapes of our ears allow us to > place sound in 360 degrees based on minute differences in timing, > timbre, phase, etc between the sounds reaching each ear. Taking this > information, some fancy math, and fast computers he was able to > deliver a 360 degree sound field from just two speakers. Or he was > trying at any rate. If I recall correctly, the system was real touchy > regarding speaker and listener positioning. Can't help but wonder > whether he ever succeeded. I'll see if I can't dig up more info on > the article in case anyone is interested.