• WordNet 3.6
    • n microphone device for converting sound waves into electrical energy
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Webster's Revised Unabridged Dictionary
  • Interesting fact: In 1876, the first microphone was invented by Emile Berliner.
    • n microphone (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.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.
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Century Dictionary and Cyclopedia
    • n microphone An instrument for augmenting Small sounds. The instrument invented for this purpose by Mr. Hughes in 1878 is based on the fact that when substances possessing little electrical conductivity are, placed in the course of an electric current, the conductivity of the system is much increased by even the very smallest amount of pressure. The instrument has various forms, but in most of them one piece of charcoal is held loosely between two other pieces in such a manner as to be affected by the slightest vibrations conveyed to it by the air or by any other medium. The two external pieces are placed in connection with a telephone, and when the ear is placed at the ear-piece of the telephone the sounds caused by a fly walking on the wooden support of the microphone appear as loud as the tramp of a horse. By suitable arrangements the sounds of the human voice conveyed from a distance by the telephone can be made, audible in every part of a hall.
    • ***
Chambers's Twentieth Century Dictionary
    • n Microphone mī′krō-fōn an instrument which renders the faintest sounds distinctly audible
    • ***


Webster's Revised Unabridged Dictionary
Micro-, + Gr. fwnh` sound, voice: cf. F. microphone,
Chambers's Twentieth Century Dictionary
Gr. mikros, little, phōnē, sound.


In literature:

By means of a hand microphone and receiver, the subject can communicate with the observers outside at will.
"Respiration Calorimeters for Studying the Respiratory Exchange and Energy Transformations of Man" by Francis Gano Benedict
It was no larger than a pack of playing cards, and its sensitive microphone was incorporated right into the case.
"The Electronic Mind Reader" by John Blaine
I turned from the microphone to find that Barry had just entered the navigating room.
"Astounding Stories of Super-Science July 1930" by Various
My little microphone receiver could be adjusted for audible air vibrations.
"Astounding Stories of Super-Science September 1930" by Various
I cut the microphone and glanced at Kincaide.
"Priestess of the Flame" by Sewell Peaslee Wright
Trembling, Sako faced the microphone.
"The Affair of the Brains" by Anthony Gilmore
There's one feature of the microphone that is likely to be troublesome; it makes loud noises sound hundreds of times louder.
"St. Nicholas Magazine for Boys and Girls, Vol. V, August, 1878, No 10." by Various
At one end was a mass of machinery, and a microphone hung suspended before it.
"Astounding Stories, February, 1931" by Various
A microphone hung before him and his words rang through every vessel of his convoy.
"Astounding Stories of Super-Science, December 1930" by Various
Harbrace moved quickly to the rostrum microphones.
"The Thirst Quenchers" by Rick Raphael

In poetry:

And he knows from a hundred signals the buzzing call of his own,
The breaks and the vibrant stresses, —
The F, and the G, and the Esses,
That call his hand to the answering key and his mouth to the microphone.
"Signals" by Gilbert Frankau

In news:

British microphone manufacturer Clockaudio recently launched the Retracta Series of retractable microphones for the boardroom table.
The Reversible Dual Ear Microphone accessory from Point Source Audio (PSA) is a?one-size-fits-all.
Approach to ear-worn microphones that provides users with four configurations in which to wear their PSA ear-worn mics, says the company.
The SCR monitor contains a microphone that records the time a cow spends ruminating each day plus an activity monitor.
The microphones mt eerie mt eerie k records.
FILE ** Unaware that a microphone was recording him, President Obama more.
Microphone manufacturer Shure announced its acquisition of Crowley and Tripp Ribbon Microphones from Soundwave Research Laboratories.
Shure employees put several of their microphones through what can only be described as the ultimate torture test.
The VP89 is a new family of shotgun microphones from Shure introduced at the 2011 NAB Show.
Microphone manufacturer Shure has introduced the latest additions to its line of KSM microphones: the KSM42 and KSM44A.
Shure Offers Microphones for the Masses.
"It's hard to socialize when you're wearing a microphone.".
New business manufactures dime-size microphone/receiver to replace the traditional phone handset.
Turns out Gov Christie does have a filter to process his thoughts before he speaks into a microphone.
It's a mob of microphones and reporters on media day.

In science:

The thresholds, (2÷10) keV, being mainly determined by leakage currents and electronic and microphone noises, are too high for the experiment on the measurement of the neutrino magnetic moment with ATS.
Status of the Experiment on the Laboratory Search for the Electron Antineutrino Magnetic Moment at the Level mu_nu < 3 s 10^{-12}mu_B
The lateral brace and stiffening rings of the SNS bg = 0.61 cavity will be used on the bg = 0.47 cavity to reduce microphonic excitation.
Status Report on Multi-Cell Superconducting Cavity Development for Medium-Velocity Beams
The RIA cavities will be over-coupled in order to ensure that the gradient can be maintained in the presence of microphonics .
Status Report on Multi-Cell Superconducting Cavity Development for Medium-Velocity Beams
Some microphonic measurements were done on a single-cell cavity .
Status Report on Multi-Cell Superconducting Cavity Development for Medium-Velocity Beams
The next steps in this QWR prototyping effort will be the fabrication of complete cavities with integrated He vessels and the characterisation of microphonics.
Niobium Quarter-Wave Resonator Development for The Rare Isotope Accelerator