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In another compartment he heard a dispatcher chattering his own special code-language into a microphone in a low-pitched voice. He passed another grill, and then stopped short as a familiar voice drifted through. Merrill Tawney's voice. Tom hugged the grill, straining to catch the words. The company man sounded angry; the man he was talking to sounded even angrier.
"A microphone?" he repeated as he opened the box, looked sharply at the two black little storage batteries inside, the coil of silk-covered wire, a little black rubber receiver and a curious black disc whose face was pierced by a circular row of holes. "Yes. You must have heard of them. You hide that transmitter behind a picture or under a table or desk.
The eye of the camera sees the invisible and photographs the image of the ultra-violet rays; the tympanum of the microphone hears what to us is silence. A scientific toy, a chemical contrivance surpass us in sensibility.
Munro, and to which the name thermo-microphone might be given, as it is a microphone in which thermo-electric currents are employed in the place of voltaic currents, its special feature of interest lying in the fact that the heated junction of the thermo-electric couple is identical with the microphone contacts of the two electrodes.
The fighting rocket drew closer, cut in its nose tube, and hovered only a few hundred feet above the Planeteers. Rip summoned enough strength to make his voice sharp and clear. His words sped through space into the bubble of the pilot, echoed in the helmet and were picked up by the pilot’s microphone, then hurled through the snapper-boat circuit through space to the control room of the cruiser.
The space between the blocks is closed with wax, W, to exclude the air, but not to touch the ring on the pencil. A block of cork fitting close to the carbon blocks on all sides is then firmly secured to the other block of cork. The microphone should lie horizontally or at a slight angle. This microphone produces in any good telephone perfect articulation in a loud and full tone.
It was attached to a wire which was embedded in the plaster and this the colonel severed with a stroke of the knife. "This is the business end of a microphone," he said. "The voice!" gasped Pinto, and the colonel nodded. "Of course. I was mad not to guess that," he said. "That's how he heard and that's how he spoke. Now, we're going to get to the bottom of this."
"I'm thinking what a hell of a funny world this is, when people like Dabney and Bill and Jones and I are the ones who have to begin operation outer space!" Cochrane said kindly into the vision-beam microphone to Earth, "Cancel section C, paragraph nine. Then section b from paragraph eleven. Then after you've canceled the entire last section fourteen we can sign up the deal."
I close-reefed my ears that is to say, I bent the flaps of them down and furled them into five or six folds, and pressed them against the hearing-orifice but it did no good: the faculty was so sharpened by nervous excitement that it was become a microphone and could hear through the overlays without trouble. My anger grew to a frenzy.
Wade and Fuller manned the ray projectors again; Arcot dropped the ship toward the city, one hand on the reverse switch in case the inhabitants tried to use the magnetic beam again. At last, they had come quite low. There were no ships in the air, and no people in sight. Suddenly, the outside microphone picked up a low, humming sound.
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