Japanese researchers have created a non-lethal gun that silences people up to 100 feet away.
Via Extreme Tech:
The gun has two purposes, according to the researchers: At its most basic, this gun could be used in libraries and other quiet spaces to stop people from speaking — but its second application is a lot more chilling.
The researchers were looking for a way to stop “louder, stronger” voices from saying more than their fair share in conversation. The paper reads: “We have to establish and obey rules for proper turn-taking when speaking. However, some people tend to lengthen their turns or deliberately interrupt other people when it is their turn in order to establish their presence rather than achieve more fruitful discussions. Furthermore, some people tend to jeer at speakers to invalidate their speech.” In other words, this speech-jamming gun was built to enforce “proper” conversations.
The gun works by using a directional mic to capture the offending voice and then rebroadcasting the audio back to them with directional speakers. The reported effect is similar to talking on the phone when there’s an echo. As we hear the delayed feedback our brains get jammed.