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Updated: May 15, 2025
Theoretically, sound-waves also extend to an infinite distance, but I don't believe that any possible detector and amplifier could reconstruct a voice more than an hour or so after it had spoken. It might, though we'll have to try it some time, and see. You're fairly good at lip-reading, as I remember it. Get as much of it as you can, will you?"
Then he sat up to listen for the old sounds the groans and the snorts but they had ceased. A mist, like a wet blanket, had settled down over the Okapi, over the islands and the river; and, though any sounds made on the water were startlingly distinct, confined as the sound-waves were by the mist, the creatures had evidently gone to sleep. There was, however, one visitor faithful to him.
The sea in the vicinity of the ship became phosphorescent three or four times; the sheet of fire in every case, sweeping down upon us from the north at a rate of speed that seemed to be about equal to the speed of sound-waves in air.
Waves of sound reach the ear, and are directed by the concha to the external passage, at the end of which they reach the tympanic membrane. When the sound-waves beat upon this thin membrane, it is thrown into vibration, reproducing in its movements the character of the air-vibrations that have fallen upon it.
"I say 'we, as without the response of your instrument the action of a super-radium current on sound-waves would not have been discovered." "I feel that I can hardly share in the honors," I protested modestly. "Without the super-radium current from Mars, I would still be experimenting with the hope of finding a substitute for glass."
They are like sound-waves sent into the teeth of the wind, only they travel more slowly.
All of the various vowels are simply modifications of this element by altering the shape of the mouth cavity and orifice, while the consonants are produced by interrupting the sound-waves with the palate or lips or tongue.
The very atmosphere about us is charged with the thought-forces that are being continually sent out. When the thought-forces leave the brain, they go out upon the atmosphere, the subtle conducting ether, much the same as sound-waves go out.
Everywhere in Europe also this fact was corroborated, and in some places even a seventh oscillation was recorded. The Greenwich record shows that the air-waves took about thirty-six hours to travel from pole to pole, thus proving that they travelled at about the rate of ordinary sound-waves, which, roughly speaking, travel at the rate of between six and seven hundred miles an hour.
It was impossible, however, to maintain the devices in adjustment for more than a few seconds, since the invention depended upon the make-and-break principle, the circuit being made and broken every time an impulse-creating sound went through it, causing the movement of the diaphragm on which the sound-waves impinged.
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