Imagine if you were a spy who needed to receive secret messages while you walked around a crowded room, but you didn't want to wear an earpiece. Well, a cheap new device could help. It's billed as being "the first sound projector that can track a moving individual."
.. Continue Reading Inexpensive acoustic projector delivers sound to moving targetsCategory: Science
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from New Atlas (Gizmag) https://ift.tt/2YR6JCI
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