8d0c15fd   
   XPost: sci.electronics.design   
   From: speffSNIP@interlogDOTyou.knowwhat   
      
   On Thu, 19 Jan 2012 20:20:42 -0800 (PST), RichD   
    wrote:   
      
   >A noise canceling headphone consists of a headphone,   
   >plus an external microphone fed to an inverting input,   
   >right?   
   >   
   >Why does that cost $40 extra?   
      
   I paid more like $150 more-- worth every cent.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)