Mr. skyfish,skyfish wrote:Some review from the book:
Then Dr. Brown flipped another switch, and suddenly the fan became a loudspeaker, with
clear, bright, undistorted sound pouring through the baffles without any kind of cone or
magnetic coil to move the air.
Morgan could not believe what he was hearing. This really was new, different, and
exciting. “My mind was blown,” Morgan recalled, “and as he turned up the volume of the
music my mind went away on a very long trip!”
Dr. Brown then explained that since the fan/speaker had no moving parts, there was no
distortion, and so the frequency range could go well beyond the range of any kind of
conventional loudspeaker. And he explained how the speaker could be constructed in a
set of matching pairs, one acting as a transmitter, the other as a receiver.
Suddenly Morgan felt like “some kind of bomb had gone of inside my head.” Dr. Brown
watched him, with an impish, quizzical look on his face as Morgan sorted through the
possibilities, slowly grasping the implications of what he was seeing and hearing.
“So, if there’s no limit to the frequency, you could use this as a communications device…
you could send a signal with this, and nobody else would be able to hear it, huh?”
Dr. Brown just smiled at Morgan. “Nope,” he said, putting his glasses on and going back
to work.
skyfish
Either there will be a test on this since you called it a review or there is a point you are attempting to make.
Mikado