Japanese researchers developed a gun that could stop people from talking from 30 meters away. The “SpeechJammer” does not harm the individual at all but does mess with their brain’s cognitive processes.
The gun records the target’s speech and fires it back at them at a delay of a few hundred milliseconds. This affects the brain’s cognitive abilities and causes the person to stutter and then stop talking.
The gun is based on the principle that speaking requires constant auditory feedback. This process is disturbed when there is a delay between when someone says something and when they hear it. When there is this delay, the person gets confused and stops speaking. The SpeechJammer may be the perfect solution to hush those speaking too loudly in a quiet place or just for people who talk too much.