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August 14, 2014
512K Day arrives, surpassing some
routers capacity, breaking the internet. More...
November 19, 2008
European Organization for Nuclear Research (CERN) said that repairing the Large Hadron Collider (LHC) will cost up to €16.6 million or US$21 million. More...
April 30, 2008
HP Labs announces the creation of a Memristor, the fourth basic element of electronic circuits with the Resistor, Capacitor, and Inductor.
December 4, 2007
On the third day of the 2007 Taipei IT Month in
Taiwan yesterday, notebook computers and desktop computers built with AMD's and Phenom processor Intel openly battled for the consumer-market after each company launched their Penryn processor quad core processors. More...
February 27, 2007
South Pole Telescope has recently collected its first light in a long-term project to learn about the nature of dark energy. More...
, sometimes referred to as a microphone mike or mic, is an acoustic to electric transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP. Several early inventors built primitive microphones prior to Alexander Bell, but the first commercially practical microphone was the carbon microphone conceived in October, 1876 by Thomas Edison.
electronics, a or vacuum tube thermionic valve, is a device generally used to amplify, switch or otherwise modify, a signal by controlling the movement of electrons in an evacuated space.
For most purposes, the vacuum tube has been replaced by the much smaller, less power-hungry, and less expensive
transistor, either as a discrete device or in an integrated circuit. However, tubes are still used in specialized applications, such as in high-end audio systems and high power RF transmitters. Cathode ray tubes are still used as a display device in television sets and computer monitors (although they face serious competition from LCD and plasma displays), and magnetrons are the source of microwaves in microwave ovens.