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A company dedicated Solely to the Ultrasound Profession.

Christian Andreas Doppler was an Austrian mathematician and physicist. He is celebrated for his principle — known as the Doppler effect — that the observed frequency of a wave depends on the relative speed of the source and the observer. He used this concept to explain the color of binary stars. 

Born: November 29, 1803, Salzburg, Austria 

Died: March 17, 1853, Venice,

Italy Full name: Christian Andreas Doppler 

Known forDoppler effect 

EducationUniversity of Vienna (1829), 

Vienna University of Technology (1822–1825), 

Czech Technical University in Prague 

ChildrenMatilda DopplerHermann DopplerBertha DopplerAdolf DopplerLudwig Doppler