"Microphone" Quotes from Famous Books
 ... vary the resistance of the path 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 with cone-shaped ends is supported loosely between the two blocks, conical ...
— Cyclopedia of Telephony & Telegraphy Vol. 1 - A General Reference Work on Telephony, etc. etc. • Kempster Miller
... interesting 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 Mayer's ...
— Freedom in Science and Teaching. - from the German of Ernst Haeckel • Ernst Haeckel
... noted with growing irritation that the continuously affable aspect of the Venusians had not altered in any way, unless it was to become even more genial and sure. The big man strode energetically to the microphone, and the other three noted a general movement of interest and admiration as ...
— The Lord of Death and the Queen of Life • Homer Eon Flint
... with front line by tunnels. Protected from grenades by heavy gratings, when 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: ...
— Military Instructors Manual • James P. Cole and Oliver Schoonmaker
... broad-shouldered officer, wearing the magnificent black-and-gold uniform of the Solar Guard, spoke into a small microphone and waited for an acknowledgment. ...
— The Revolt on Venus • Carey Rockwell
... you heard stood close together around the microphone, each one reading from a copy of the play in his hand. Since they could not be seen, they did not act parts as in other plays, but tried to make their voices show how ...
— Washington Crossing the Delaware • Henry Fisk Carlton
... 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 ...
— Innocents abroad • Mark Twain
... made for a well-known inventor, D.E. Hughes, who from 1879 to 1886 followed up some very curious experiments in which also these oscillations certainly played a considerable part. It was this physicist who invented the microphone, and thus, in another way, drew attention to the variations of contact resistance, a phenomenon not far from that produced in the radio-conductors of Branly, which are important organs in the Marconi system. Unfortunately, fatigued and in ill-health, Hughes ceased his researches ...
— The New Physics and Its Evolution • Lucien Poincare |
