GBB: [www.survivalchoices.com image 500x500]Just hit the feedback loop and you can drown them out while silencing them.
Yaw String: $5.00 bucks says it won't work on Sarah Palin.
jfarkinB: I get the principle, but I wonder why this same effect doesn't prevent people from using public-address systems where there are echoes.Also, I was kind of hoping for some sort of phase-cancellation trick, although I doubt that it's possible in practice. One of Arthur C. Clarke's Tales from the White Hart had fun with the idea.
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