Transmitting Sound with Light
Jan-26-19
A breakthrough new laser system can send an audio signal directly to a chosen individual without detection by anyone else.Developed by a team from MIT, the technology relies on the photoacoustic effect in which a material forms sound waves by absorbing light. First explored by Alexander Graham Bell, the MIT system was made possible by today’s advanced technology, which uses the extremely bright light source of a laser and the natural water in the air as the receiving material. The audible message can be created by either sweeping the laser at the speed of sound or modulating its power, with advantages in either higher resolution of louder audio.
The team plans to continue refining the technology to increase the ranges at which it will work and determine useful applications.
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Individuals might act as links and data carriers between local networks, which would be difficult to be monitored by outsiders because of dispersion and time delays.
Posted by Uolevi Kattun on January 28, 2019
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Individuals might act as links and data carriers between local networks, which would be difficult to be monitored by outsiders because of dispersion and time delays.
Posted by Uolevi Kattun on January 28, 2019
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