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Along with Gerhard Sessler, West invented the foil electret microphone in 1962 while developing instruments for human hearing research. [7] [8] Compared to the previous condenser microphones, the electret microphone has higher capacitance and does not require a DC bias. [9]
Edison in 1861. Thomas Edison was born in 1847 in Milan, Ohio, but grew up in Port Huron, Michigan, after the family moved there in 1854. [8] He was the seventh and last child of Samuel Ogden Edison Jr. (1804–1896, born in Marshalltown, Nova Scotia) and Nancy Matthews Elliott (1810–1871, born in Chenango County, New York).
Raymond A. Litke (1920-1986) was an American electronic engineer, the inventor of a practical wireless microphone, and the first to patent the wireless microphone.He was born and raised on a farm near Alma, Kansas, but spent most of his adult life in San Jose, California.
View from the Window at Le Gras 1826 or 1827, believed to be the earliest surviving camera photograph. [1] Original (left) and colorized reoriented enhancement (right).. The history of photography began with the discovery of two critical principles: The first is camera obscura image projection; the second is the discovery that some substances are visibly altered by exposure to light. [2]
The first permanent photograph of a camera image was made in 1826 by Nicéphore Niépce using a sliding wooden box camera made by Charles and Vincent Chevalier in Paris. [11]: 9–11 Niépce had been experimenting with ways to fix the images of a camera obscura since 1816. The photograph Niépce succeeded in creating shows the view from his window.
Alexander Graham Bell (/ ˈ ɡ r eɪ. ə m /, born Alexander Bell; March 3, 1847 – August 2, 1922) [4] was a Scottish-born [N 1] Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone.
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]
He played a key role in the history of the camera. [1] The very first photograph was taken in 1825 by Joseph Nicéphore Niépce, a French inventor who used a sliding wooden camera box made by Chevalier. [3] [2] He died in 1841 in Paris, France. [1] His son became a manufacturer of cameras and lenses. [3]