What is Christian Gottlieb Kratzenstein?
[[File:Christian_Gottlieb_Kratzenstein.jpg|thumb|268x268px|Christian Gottlieb Kratzenstein. Copper etching based on drawing by Paul Ipsen, 1781.]] '''Christian Gottlieb Kratzenstein''' (30 January 1723, [[Wernigerode]]&nbsp;– 6 July 1795, [[Copenhagen]]) was a German-born [[Physician|doctor]], [[physicist]] and [[engineer]]. From 1753 to the end of his life he was a professor at the [[University of Copenhagen]] where he served as [[Rector (academia)|rector]] four times. He is especially known for his investigations of the use of [[electricity]] in [[medicine]] and the first attempts at mechanical [[Text to speech|speech synthesis]]. As a teacher he wrote the first textbook on [[experimental physics]] in the united kingdom of [[Denmark-Norway]].Around 1780, he built a machine that was able to [[Text to speech|imitate vowels]]. This was the base for later such machines which were more advanced. In 2010, the city of Wernigerode, where he was born, named a street in his honor. {{DEFAULTSORT:Kratzenstein, Christian Gottlieb}} [[Category:1723 births]] [[Category:1795 deaths]] [[Category:German physicists]] [[Category:German engineers]]