Microphone
Transcript: Microphone was the first person to "coin" the term microphone . Charles was an English physicist and inventor who worked with the electric telepgraph. Most people used the term microphone to describe stethoscopes, because they were used for amplifying sounds. 1920 Elsiha Gray was the 39th entry of the day Every one of these microphones were ended in the 1990's. This would make way for newer and more advanced microphones in the 2000's 1895 1877- Alexander was the 5th entry of the day How the microphone works. Also popular for Broadcasting in the 1920's In the 1940's, many broadcasters switched to the Directional microphone. These microphones gave the broadcasters different patterns to choose from, which could be switched. Particulate Flow Detection Microphone During this time, these different people invented the Liquid Microphone. The definition was "An instrument in which small sounds are intensified. Elisha Gray RCA's original logo. These microphones are made to detect sounds vibrations in objects that are far away. They can detect pressure waves in the air and convert them to sound. Alexander Graham Bell makes his way into microphone history yet again with Emile Berliner. After Berliner made his telephone transmitter, Bell found out, and bought the design from Berliner for $50,000. For an example of a laser microphone, there could be a conference in a room, with a laser microphone placed somewhere in the room. While people are talking, the laser will detect vibrations and bounce back to the detector. Most of these microphones used close to one horsepower to work The first phone conversation between Bell and Watson used an early version of a liquid microphone Condenser Bell recieved patent 174,465 for the telephone In the dynamic Microphone, sound waves cause the thin strips of the diaphragm to move the magnet which moves th coils and makes a current. Emile Berliner The carbon microphone ends in the 80's Citations Timeline Majoranna,Chambers,Vanni and Sykes U.S. patent 7,580,533 The word microphone first appeared in a dictionary in 1638. These microphones had to use very low powered radio transmitters,or else the circut would overheat This microphone is used for soilders to detect the direction of bullets in a very loud place, by blocking out all other sounds and measuring mechanical movement of individual air particles Wireless telepgraphy has been invented by Nikola Tesla in 1895 Many companies were now designing and making carbon microphones, which gave radio stations better sound quality with less power usage. 300 B.C Modern day microphone 1860's 1906-1914 On Feburary 14th, 1876, both of these men sent in an invention to recive a patent. Each man sent in pretty much the same design, and even though it is argued who sent it in first, Alexander "won" the patent. At this point in time people were trying to find a way to send wireless speech signals. The only microphone available was the one on a telephone transmitter. RESLO Superstar microphone In most studios, the Candlestick telephone ws used as the radio microphone. People would talk into the mouthpiece and the reciever would be connected to radio transmitters so people could listen. United States Patent 3,118,022 Popular broadcasting microphone in the 1920's Microphone VS. The first AM commercial radio brodcast was made by KDKA in 1921 RCA 44 Style Ribbon Microphone MOst sensitive microphone Made by Sonion Microphone RCA logo now It was called the Carbon Granule Transmitter 1930's RCA's original logo. The Electric microphone RCA introduced this pressure microphone in the early 1950's. It was usually made for speech and music, and mounted on an Atlas Stand. It was used at radio station KSL in Salt Lake, Utah. 1900 Around the 1870s, Elisha Gray invented a liquid transmitter, to be used for a telephone. This used a battery connecting two rods, which changed in proportion to sounds. Worlds most expensive microphone This microphone was a favorite for pop stars of that time. RCA's original logo http://mrtripodi.pbworks.com/Eric-Collins-Microphone-notes Western Electric Double-Button Carbon Shure Unidyne Model 55 This is Elisha Gray's model of his design compared to Alexander Grahm Bell's design. Johann Philipp Reis Μικροφονε This microphone is 2.6 x 1.6 mm Neumann U47/67 Johann Philipp Reis WAS A GERMAN physicist WHO WORKED ON A TELEPHONE TRANSMITTER. hIS DESIGN USED A METTALIC STIP ON A MEMBRANE TOUCHING A METAL BALL COMPLETEING AN ELECTRIC CIRCUT. 1940's In the 1960's, James West and Gerhard Sessler invented the electroacoustic transducer, or an electric microphone. Commerical Broadcasting Era Western Electric Condenser Elsiha Gray Dynamic This definition applied to ear trumpets and megaphones of that time. 1886-1892 Sir Charles Wheatstone 1870's 1827- Thomas Edison improved the microphone by adding a small button like container. It worked like a piston in the microphone, and gave it a high reliability. Almost 1 billion of these were manufactured every
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