653b0d0c   
   XPost: sci.physics, sci.optics   
   From: spam@spam.com   
      
   On Wed, 20 Apr 2011 19:48:46 -0700 (PDT), RichD   
    wrote:   
      
   >This may be a dumb question, I never studied acoustics....   
   >   
   >If you look into the wrong end of a telescope,   
   >everything looks reduced, 'anti-magnified'.   
   >Is there anything analogous acoustically?   
   >   
   >In both cases, the phenomena is described   
   >by wave equations -   
      
   It is completely analogous. A telescope makes things look closer. A   
   directional microphone makes things sound closer.   
      
   If you look through a telescope the wrong way, things look further   
   away. If you point a directional microphone the wrong way, things   
   sound further away.   
      
   d   
      
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