Παρασκευή 12 Μαΐου 2017

Ultrasonic speaker lets you whisper to people 30 metres away

Wearable device beams words using targeted sound waves to prevent anyone overhearing and could eventually be used by soldiers and divers

from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2pt339E
via IFTTT

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