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William Hathaway Forbes
Reginald Fessenden
Harvey Fletcher
Bell Lab physicist and speech expert
Harvey Fletcher (September 11, 1884 – July 23, 1981) was an American physicist. Known as the "father of stereophonic sound", he is credited with the invention of the 2-A audiometer and an early electronic hearing aid. He was an investigator into the nature of speech and hearing, and made contributions in acoustics, electrical engineering, speech, medicine, music, atomic physics, sound pictures, and education. Following his death, he was credited with collaborating with his doctoral advisor, Robert Millikan, on the Nobel-prize winning oil drop experiment which first determined the charge of… More on Wikipedia →
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Related concepts (3)
Critical band
In audiology and psychoacoustics the concept of critical bands, introduced by Harvey Fletcher in 1933 and refined in 1940, describes the frequency bandwidth of the "audit…
Equal-loudness contour
An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure s…
Stereophonic sound
Stereophonic sound, commonly shortened to stereo, is a method of sound reproduction that recreates a multi-directional, three-dimensional audible perspective. This is usu…