The Navy Invented a Device to Prevent People From Talking – the speech jammer.

The system can get very sneaky by repeating anything a speaker says milliseconds after it’s said.

The handheld acoustic hailing and disruption (AHAD) was developed by engineers at Naval Surface Warfare, Crane Division, a Navy research and development facility in Indiana that develops handheld and crew-served weapons for the service. The patent, New Scientist reports, was issued in 2019 but only discovered this year.

“By utilizing directional microphones and speakers, only a target speaker’s voice will be picked up by the system, and only a target speaker will hear the transmitted audio.”

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