I shall call it the shut up gun
I'm sure at some point we have all been with a group of people or perhaps even a single person that just won't stop talking, no matter what is going on around them. You know the sort that keeps talking when the movie is going or keeps the gums flapping when you are trying to watch TV. On the other hand, maybe the talker keeps on when you are trying to talk someone else. I'm sure we've all been in that situation at some point and wished we could just smack the person or tell them to STFU.
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Most of us just bite our tongues and pretend to listen. A group of Japanese scientists have come up with something that's much more interesting called the SpeechJammer. The device looks like a big blocky gun with one of those tiny little cups from the dentist attached to the top. That tiny cup is actually an antenna and the grid looking shape of the front is a speaker. The device also has a microphone attached.
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When someone is talking and you don't want to hear them, you aim the SpeechJammer at them and pull the trigger. It is able to disturb the speech of the person without causing them any discomfort. The mic picks up what they're saying and then shoots it back at them with the delay of about 0.2 seconds making it difficult to talk. That sounds interesting to me.