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Microphone   Listen
noun
microphone  n.  (Physics) An instrument for converting sounds into electrical signals, for the purpose of recording or amplifying the sounds. It produces its effects in various ways, as for example by the changes of intensity in an electric current, occasioned by the variations in the contact resistance of conducting bodies, especially of imperfect conductors, under the action of acoustic vibrations. Other forms of microphone may use changes in capacitance or other phenomena to transduce the sounds into electrical signals. Note: The electrical signals produced in a microphone may be transmitted to recording or amplifying equipment through a conducting wire, or by transmission as radio waves. The latter method is popular for use in small mobile microphones used by performers in plays and other entertainment events, at public meetings, and by broadcast personnel.






Collaborative International Dictionary of English 0.48








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"Microphone" Quotes from Famous Books



... he had unwrapped it, that it was a very powerful microphone and a couple of storage cells. He attached it to the wire leading out to the electric ...
— Guy Garrick • Arthur B. Reeve

... the ships, the commanders simply held off the bombardment that would have vaporized the derelict. In the sixth, Major Thornton, the Group Commander, snapped off the microphone. His voice was shaky as he said: "That was close! Another second, and we'd have ...
— The Highest Treason • Randall Garrett

... chance the set was broken. He quickly twisted the transmitter to the frequency of his personal radio, then whistled in the microphone. The received signal was so loud that it hurt his ears. He tried to call Hys again, and was relieved to get a response ...
— Planet of the Damned • Harry Harrison

... I looked for tell-tales, and found a television lens set above the door of the room eight feet outside of my steel barrier. Beside the lens was a speaker grille and a smaller opening that looked like a microphone dust cover. ...
— Highways in Hiding • George Oliver Smith

... apparatus, a system of "relays," by means of which it would be possible to augment an initial stimulus, however slight, a magnifying apparatus which would greatly increase the volume of sound, on the lines of the ampliphone and the microphone, etc. I do not believe that very definite results were ever achieved, and he is still at work upon the problem. Needless to say, this idea of his was ridiculed in all quarters; but I myself do not see any valid reason why some such device should not succeed—provided, ...
— The Problems of Psychical Research - Experiments and Theories in the Realm of the Supernormal • Hereward Carrington

... through them when subject to such vibrations as would alter the intimacy of contact. He thus discovered and formulated the principles of loose contact upon which the operation of all modern transmitters rests. Hughes' device was named by him a "microphone," indicating a magnification of sound or an ability to respond to and make audible minute sounds. It is shown in Fig. 8. Firmly attached to a board are two carbon blocks, shown in section in the figure. A rod of carbon ...
— Cyclopedia of Telephony & Telegraphy Vol. 1 - A General Reference Work on Telephony, etc. etc. • Kempster Miller

... collection of experiments, described with just the right amount of abstract information and no more, and placed in progressive order. The recent inventions of the phonograph and microphone lend an extraordinary interest to this whole field of experiment, which makes Professor ...
— Freedom in Science and Teaching. - from the German of Ernst Haeckel • Ernst Haeckel

... barely able to force the word from between my lips. Hendricks ... and Liane? Hendricks ... a traitor? I cut the microphone and glanced at Kincaide. He must have read the facts in ...
— Priestess of the Flame • Sewell Peaslee Wright

... to undergo some marvellous changes these next few years—mechanically, politically, socially, and morally; the telephone, the phonograph, the microphone, the telemachole and coming improvements will transform our modes of labour and learning beyond our present conception. God times inventions and improvements to ...
— The Lost Ten Tribes, and 1882 • Joseph Wild

... his train of thought to focus once more on the submarine problem. But for some reason the business with the microphone and the speaker in the next room kept ...
— Tom Swift and the Electronic Hydrolung • Victor Appleton

... down the microphone very carefully to keep from slamming it down and stalked back into his quarters. Angrily he began to take his radiation clothing from ...
— Narakan Rifles, About Face! • Jan Smith

... Kleig entered the Secret Room and at a signal all the many doors behind him, along that interminable stairway, swung shut and were tightly locked, the news-gatherer raced for the microphone and gave the "priority" signal to the operator. Millions of people would not only hear the words of the news-gatherer, but would see him, note the expressions which chased one another across his face. For television was long since an ...
— Astounding Stories of Super-Science April 1930 • Various

... Chadwick. "Now then, as you also know the wire telephone works by a metal disc in the receiver, vibrating in exactly the same way as does the microphone in the transmitter. According to the vibrations of the voice of the person sending the spoken message, the electric current along the wire, acted upon by the microphone in the transmitter, increases or decreases. This increasing and decreasing current acts on a thin metal disc or diaphragm ...
— The Boy Inventors' Radio Telephone • Richard Bonner

... evenings, but no one knew who was coming, from scientific peers to daily governesses, from royal academicians to medical students, from a philanthropic countess to a city missionary. To listen to an exposition of the microphone, to share in a Shakespeare reading, or worse still, in a paper game, was, in the Captain's eyes, such a bore that he generally had only haunted Collingwood Street on home days and on Sundays, when, for his mother's sake and his ...
— Magnum Bonum • Charlotte M. Yonge

... Modification of Wheatstone's Microphone and its Applicability to Radiophonic Researches. By ALEX. ...
— Scientific American Supplement, No. 288 - July 9, 1881 • Various

... possible, and by concealment. 2. Occupied by 4 men (1 in command), in 3 reliefs. Usually occupied only at night unless our trenches are on a reverse slope. 3. Chief function is protection of the entanglements. (d) Microphone Posts.—Installed usually behind the first line. Intercept the enemy's telephone and ground-telegraph messages and any loud conversation in his trenches. (e) Fixed Patrols.—Generally remain in shell holes in front of our entanglements. (f) Reconnoitering Patrols: 1. Composed ...
— Military Instructors Manual • James P. Cole and Oliver Schoonmaker

... compartment, with all kinds of maps and rulers and things. He keeps bent low over a welded-to-the-wall (they call it the bulkhead, for some reason or other) table, scratching away with a ballpoint pen on the maps, and now and then calling numbers over a microphone to the pilot. His hair is red and curly, and he looks as though he'd be tall if he ever gets to stand up. There are freckles on the backs of his hands, so I think he's probably got them on his face, too. So far, all he's ...
— The Dope on Mars • John Michael Sharkey

... microphone and called the control tower at Kirtland AFB and reported what he and his crew had seen. The tower relayed the message to the local ...
— The Report on Unidentified Flying Objects • Edward Ruppelt

... That's a microphone—the big one they just erected near the instrument room. There's something coming! That's the magnified sound of some distant rush of air. Very faint sound, but they must have heard it on the ear-phones long ago. That microphone must have just ...
— Tarrano the Conqueror • Raymond King Cummings



Words linked to "Microphone" :   bug, spike mike, crystal microphone, mike, cardioid microphone, capacitor microphone, microphone boom



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