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One-Way Sound Walls Proven Possible 177

disco_tracy writes "Imagine a room where a band is playing. Neighbors can't hear the music, but if someone outside the room is talking, the musicians can hear it. The concept — a kind of one-way mirror for sound — seems imaginary, but two Italian scientists recently pushed this kind of sound manipulating technology closer to reality (abstract)."
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One-Way Sound Walls Proven Possible

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I have a theory that it's impossible to prove anything, but I can't prove it.