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David Edward Hughes (16 May 1830 – 22 January 1900), was a British-American inventor, practical experimenter, and professor of music known for his work on the printing telegraph and the microphone. [3]
Marconi technician Peter Wright, a British scientist and later MI5 counterintelligence officer, ran the investigation. [9] He was able to get The Thing working reliably with an illuminating frequency of 800 MHz. The generator which had discovered the device was tuned to 1800 MHz.
German physicist Ewald Georg von Kleist and Dutch scientist Pieter van Musschenbroek invented Leyden jars. 1752: American scientist Benjamin Franklin showed that lightning was electrical by flying a kite and explained how Leyden jars work. 1780: Italian scientist Luigi Galvani discovered Galvanic action in living tissue. 1785
Walter Hans Schottky (German: [ˈvaltɐ ˈʃɔtki]; 23 July 1886 – 4 March 1976) was a German physicist who played a major early role in developing the theory of electron and ion emission phenomena, [2] invented the screen-grid vacuum tube in 1915 while working at Siemens, [3] co-invented the ribbon microphone and ribbon loudspeaker along with Dr. Erwin Gerlach in 1924 [4] and later made ...
1986 – Kodak scientists invent the world's first megapixel sensor. 1987 Canon releases the first camera for its fully electronic autofocus EF lens mount, the EOS 650 [20] Photoshop developed by Thomas and John Knoll; 1990 — Adobe Photoshop 1.0 released on February 19, for Macintosh exclusively. [21] [22] 1992 – Photo CD created by Kodak. [23]
First patent on foil electret microphone by G. M. Sessler and J. E. West (pages 1 to 3) West was born on February 10, 1931, in Farmville, Prince Edward County, Virginia as the elder of two children to Samuel Edward and Matilda West.
Ring-and-spring microphones, such as this Western Electric microphone, were common during the electrical age of sound recording c. 1925–45.. The second wave of sound recording history was ushered in by the introduction of Western Electric's integrated system of electrical microphones, electronic signal amplifiers and electromechanical recorders, which was adopted by major US record labels in ...
Heinrich Rudolf Hertz (/ h ɜːr t s / HURTS; German: [ˈhaɪnʁɪç hɛʁts]; [1] [2] 22 February 1857 – 1 January 1894) was a German physicist, who first conclusively proved the existence of the electromagnetic waves predicted by James Clerk Maxwell's equations of electromagnetism, laying the foundation for the radio and modern telecommunications.