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comment by benben
benben  ·  4653 days ago  ·  link  ·    ·  parent  ·  post: How to Build a Speech-Jamming Gun
All I could find was this: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5670...

I'm pretty sure it was a TED talk. Sorry I couldn't be more specific.





thundara  ·  4652 days ago  ·  link  ·  
Seems to be projection, neat though. The Exploratorium in San Francisco has two benches set up that are shaped in a way to project sound, allowing you to have conversations at opposite sides of the building.