The researchers have devised a way to communicate secretly by sending laser-transmitted audio messages directly into the area around a person’s ear.
from gizmodo http://www.gizmodo.co.uk/2019/01/scientists-figured-out-how-to-send-secret-messages-to-your-ear-with-lasers/
from gizmodo http://www.gizmodo.co.uk/2019/01/scientists-figured-out-how-to-send-secret-messages-to-your-ear-with-lasers/
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