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.
no qualif; note DOPPLER ULTRASOUND IMAGING see ULTRASONOGRAPHY, DOPPLER; Doppler flowmetry goes under ULTRASONICS; ULTRASONOGRAPHY; their specifics or LASER-DOPPLER FLOWMETRY
Other names Doppler Shift; Shift, Doppler; Effect, Doppler
