Microphone
German inventor Johann Philipp Reis designed an early sound transmitter that used a metallic strip attached to a vibrating membrane that would produce intermittent current. Better results were achieved with the "liquid transmitter" design in Scottish-American Alexander Graham Bell's telephone of 1876 – the diaphragm was attached to a conductive rod in an acid solution. These systems, however, gave a very poor sound quality.
The first microphone that enabled proper voice telephony was the (loose-contact) carbon microphone. This was independently developed by David Edward Hughes in England and Emile Berliner and Thomas Edison in the US. Although Edison was awarded the first patent (after a long legal dispute) in mid-1877, Hughes had demonstrated his working device in front of many witnesses some years earlier, and most historians credit him with its invention. The carbon microphone is the direct prototype of today's microphones and was critical in the development of telephony, broadcasting and the recording industries. Thomas Edison refined the carbon microphone into his carbon-button transmitter of 1886. This microphone was employed at the first ever radio broadcast, a performance at the New York Metropolitan Opera House in 1910.
In 1916, E.C. Wente of Western Electric developed the next breakthrough with the first condenser microphone. In 1923, the first practical moving coil microphone was built. The Marconi-Sykes magnetophone, developed by Captain H. J. Round, became the standard for BBC studios in London. This was improved in 1930 by Alan Blumlein and Herbert Holman who released the HB1A and was the best standard of the day.
Shure
The Shure SM series of microphones began with the introduction of the SM57 in 1965 and the SM58 in 1966. The SM (Studio Microphone) series microphones were originally developed with a non-reflective finish and no on-off switch for the TV studio market. The SM57 is well known for its durability and the versatile sound characteristics, much attributable to the Ernie Seeler-designed Unidyne III capsule. Produced since 1965 and still in production today, it has been widely used in many applications, including micing vocals, drums, and guitar amplifiers both in live sound and recording applications, including being used by every United States President from Lyndon Baines Johnson on. It was used by Michael Jackson when recording the lead vocals for the song "Billie Jean." The SM57 was inducted into the TECnology Hall Of Fame in 2004. Together, the Shure SM57 and SM58 have been the two bestselling microphones in the world since the late 1960s. Their feature set is nearly identical, with the main difference between the two being their different grilles. Shure later expanded the SM series, which now include such models as the now hard to find SM53 & SM54 (which were low proximity effect microphones), SM58, SM48, SM86, SM87A, SM57, SM94, and the SM81 which is a longtime recording studio standard.