Thursday, April 25, 2013

They can talk under water

LED devices let divers talk underwater | SmartPlanet

I'm a little surprised this has only been invented now.   My science fiction mind also is thinking that such a system might be the basis for secure communications between space-suited spies.  (Heinlein just had people in spacesuits putting their helmets together, and I have always been curious as to whether that works well, or if you have to shout.)  Anyway, back to the invention:
A Japanese firm claims it has developed the “world’s first” communication device that allows divers to “talk” to each other by using LED technology to convert voices into light signals.

The Okinwa-based firm, Marine Comms Ryukyu, has created the “i-MAJUN system,” which combines a light-emitting diode (LED) flashlight with a diving mask that is able to convert a diver’s voice into LED signals that blink. When a diver wishes to talk to another underwater, the diver says their message — and then once converted into LED signals, the data is transmitted to the other diver. Signals are then converted back into speech and played back through speakers embedded in the diving mask.

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