Re: Trivial, but cool

[endwar@phys.psu.edu (Andrew Russ)]

If what Vickie's headphones have done is amplify out-of-phase sounds, 
then you can also get the same results even without a full-blown,
surround-sound system.  What you do is hook up a speaker to the 
positive terminals of boththe left and right channels (no ground 
connection).  Then you'll get the difference in the two channels 
out the one speaker.  
	Having the effect in headphones may make it easier to concentrate on 
what you're hearing, though.  

andrew