12dcb159   
   XPost: sci.physics, rec.audio.tech   
   From: hanson@quick.net   
      
   "Benj"  wrote in message   
   news:4dae03a8-7afe-4936-aaec-636cde489675@18g2000prd.googlegroups.com...   
   On Apr 21, 9:26 pm, "hanson"  wrote:   
      
   > A telescope makes things look closer.   
   > A directional microphone makes things sound closer.   
      
   This is pretty much wrong.  A telescope is an imaging device that   
   magnifies the image of distant objects. A directional microphone, on   
   the other hand, is a directional audio antenna. It is analogous to a   
   directional radio or other electromagnetic antenna, not a telescope.   
   One CAN however produce a map of some sonic source with one by   
   scanning it over the source and recording intensities.   
      
   > Bull horns and loudspeakers are certainly NOT   
   > audio telescopes as inferred by other posters.   
      
   True.   
      
   > A telescope, audio or video, is a passive instrument   
   > that absorbs incoming info/energy, like these audio   
   > gismos here:   
   >    
      
   I positively LOVE the old gadgets at this site! My all-time favorite   
   is the Dr. Seuss machine (the last one in the series of photos).   
   Thanks for the laughs, ha ha ha Hanson.   
      
   Note that these gadgets are directional microphones, NOT "audio   
   telescopes" even though they do map intensities of sources. Oh wait.   
   The exception would be the huge curved "mirrors" built on the coast.   
   These doubtless DO form sonic images of the source which can be   
   scanned by movable microphones or a huge array of them totally   
   analogous to a telescope where the image plane can be scanned with a   
   single photocell. The horn units do NOT form images.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)