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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



... applications, of course, the receivers may be combined with a microphone; yet on an aerial as well as on a subterranean line the transmitter produces effects which, as regards intensity and clearness, are comparable with those of ...
— Scientific American Supplement, Vol. XXI., No. 531, March 6, 1886 • Various

... little machine for our purposes. We can get at their most vital secrets with it. We can discover every plan which they have against us. We may even learn the hiding place of those letters Why, there is no limit. This is one of those new microphone detectives." ...
— Constance Dunlap • Arthur B. Reeve

... to connect an arc lamp with an aerial and a ground, and to use a microphone transmitter to modulate the sustained oscillations so set up. The receiving apparatus consisted of a variable contact, known as a pill-box detector, which Sir Oliver Lodge had devised, and to this was connected an Ericsson telephone receiver, then the most sensitive made. A later ...
— The Radio Amateur's Hand Book • A. Frederick Collins

... and when the end of the telephone was applied to a microphone the room fairly rang with exultant cheers, and those looking through a kintograph (visual telegraph) terminating in a camera obscura on the shores of Baffin Bay were able to see engineers and workmen waving and ...
— A Journey in Other Worlds - A Romance of the Future • John Jacob Astor

... analogous to that of the lower animals and man. In a telegraph circuit, with its clicking key at one end and its chattering sounder at the other, we have, in fact, an apish forerunner of the exquisite telephone, with its mysterious microphone and oracular plate. Nevertheless, the telephone descended from the telegraph in a very indirect manner, if at all, and certainly not through the sounder. The first practical suggestion of an electric telephone was made by M. Charles Bourseul, a French telegraphist, in 1854, but to ...
— The Story Of Electricity • John Munro

... 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 its hooks on ...
— Narakan Rifles, About Face! • Jan Smith



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



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