"Japanese researchers have invented a speech-jamming gadget that painlessly forces people into silence," Fox News reports.
The article continues, "The device works by recording its target’s speech then firing their words back at them with a 0.2-second delay, which affects the brain’s cognitive processes and causes speakers to stutter before silencing them completely."
It can work as far as 30 feet away from a person, the story says.
In a research paper the Japanese scientists wrote, "In general, human speech is jammed by giving back to the speakers their own utterances at a delay of a few hundred milliseconds. This effect can disturb people without any physical discomfort, and disappears immediately by stopping speaking."
The article also notes that the scientists "suggested the speech-jamming gun could be used to hush noisy speakers in public libraries or to silence people in group discussions who interrupt other people’s speeches."