Posted on 01/25/2019 9:54:05 AM PST by BenLurkin
Researchers at MIT's Lincoln Laboratory, a United States Department of Defense research facility, developed laser systems that can "transmit various tones, music and recorded speech at a conversational volume" to specific people without the recipient wearing any special equipment. Basically, the operator points a laser at someone from a distance and that individual hears the transmitted audio even though others in the area don't.
The new approaches are based on the photoacoustic effect, which occurs when a material forms sound waves after absorbing light. In this case, the researchers used water vapor in the air to absorb light and create sound...
One unique aspect of this laser sweeping technique is that the signal can only be heard at a certain distance from the transmitter. This means that a message could be sent to an individual, rather than everyone who crosses the beam of light.
(Excerpt) Read more at boingboing.net ...
And you thought it was bad to put Q-tips in your ears…
This will come in handy for the Rats when they’re cheating in debates. I hear that Donna Brazille just ordered the user manual for the device.
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