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The technology behind sound masking came out of the realization by scientists and engineers that "oral privacy" is actually a simple matter of making speech unintelligible. That is, if each of us can't understand what the other is saying, we have effectively established oral privacy - even though we may still be able to see and, to some extent, hear each other.
Last edited by The_Jazz; 06-30-2009 at 04:35 AM..
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