From: jamie_ka1lpa@charter.net   
      
   In article , no@spam.com says...   
   >   
   > See if you had a device which projected some kind of wave like microwaves   
   which excited dust particles (or objects in the room), which made them vibrate   
   and cause sound.... could that work?   
      
   maybe you want to look up ultrasonic audio or stereo.   
      
   Jamie   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)