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To: Sr K who wrote (92897)3/1/2010 3:49:31 PM
From: shlurker  Respond to of 213181
 
...The closer to the ear the microphone is located, the simpler the process becomes. For that, the smaller the microphone is, the better. Small mikes are easier to fit into earpieces, and recently they have been getting very small indeed...

Well, it's just the (already pretty well-developed) hearing aid technology ... 180degrees out-of phase.