Re:New Technology Uses Lasers to Transmit Audible Messages t...
by gmueckl on Saturday February 02, 2019 @06:51PM
(#19066695)
No, the amplification can only work at the speed of sound, neither faster nor slower. The paper analyzes how the wffect falls apart when you deviate from c.
What you possibly could do is to have multiple laser beams forming a sweeping comb pattern. Depending on dispersiom and other effects, you might be able to do some waveform shaping. But that is very elaborate for a loudspeaker.
Re:New Technology Uses Lasers to Transmit Audible Messages t...
by pontifier on Sunday February 03, 2019 @08:15PM
(#19073260)
That's like saying audio over radio waves can only be sent with spark gaps... you simulate this "sweeping comb" with a fast sweeping, and even faster modulating laser.
What you possibly could do is to have multiple laser beams forming a sweeping comb pattern. Depending on dispersiom and other effects, you might be able to do some waveform shaping. But that is very elaborate for a loudspeaker.