Click link to see YOUTUBE VIDEO Source: https://www.youtube.com/watch?v=KjsT_s5eWhI

Directional Speakers – Source: https://www.holosonics.com/retail

How to Build a Speech-Jamming Gun

Japanese researchers build a gun capable of stopping speakers in mid-sentence.

Source: https://www.technologyreview.com/2012/03/01/116437/how-to-build-a-speech-jamming-gun/

Dream-shaping tech from MIT channels suggestions into your dreams

Source: https://www.livescience.com/dream-manipulation-machine.html