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   rec.audio.tech      Theoretical, factual, and DIY topics in      41,683 messages   

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   Message 40,842 of 41,683   
   Jasen Betts to josephkk   
   Re: noise canceling headphones   
   28 Jan 12 06:57:47   
   
   XPost: sci.electronics.design   
   From: jasen@xnet.co.nz   
      
   On 2012-01-24, josephkk  wrote:   
   > On Mon, 23 Jan 2012 16:19:03 -0800, Jamie M  wrote:   
      
   > Not to be too much of a jerk, but just exactly how to you disambiguate the   
   > received noise signal from the reflected corrective signal?   
      
   an amplifier with negative impedance gets you part way there.   
      
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