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Noren's Acoustilock, which silences computer noise within a nearly-airtight box, sells itself. The booth guy's main pitch: He stands there, gazing at passerby. He opens the box; a CD is playing white noise louder than any computer whir I've heard. He closes the box; silence. Very impressive. Clearly a high-tech system.

So what's the point of a sign reading "Not just a box with foam!"

Acoustilock [Noren]

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