MeSH definition : Changes in the observed frequency of waves (as sound, light, or radio waves) due to
the relative motion of source and observer. The effect was named for the 19th century
Austrian physicist Johann Christian Doppler.;
MeSH annotation : no qualif; note DOPPLER ULTRASOUND IMAGING see ULTRASONOGRAPHY, DOPPLER; Doppler flowmetry
goes under ULTRASONICS; ULTRASONOGRAPHY; their specifics or LASER-DOPPLER FLOWMETRY;
Wikipedia link : https://en.wikipedia.org/wiki/Doppler effect;
Changes in the observed frequency of waves (as sound, light, or radio waves) due to
the relative motion of source and observer. The effect was named for the 19th century
Austrian physicist Johann Christian Doppler.