Inferno is a "sonic barrier," a long metallic speakerbar that generates a sound made of four frequencies between 2 and 5 kilohertz. The sound itself is 125dB, which is the typical sound made by an alarm, but according to Danger Room's Sharon Weinberger, it's "the most unbearable, gut-wrenching noise I've ever heard in my life." It was a very quick exposure but Sharon says that it was a lot worse than the Pentagon pain ray. We talked with Dr. Maurice Goldman, managing director for the company in the US, about the uses and cost of these devices.
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