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Doppler Effect

QuestionAnswer
what is doppler effect? change in frequency caused by motion of a sound source, receiver, or reflector
doppler effect happens because of motion of 3 things: source receiver reflector
if reflector is moving toward the source, then the echo has a _____ frequency higher
if motion is away from source, the frequency of echo is _____ lower
the change of frequency caused by motion is called a _____ _____ doppler effect
the doppler shift is proportional to _____ ____ flow speed
the doppler shift depends on the cosine of the ____ ____ doppler angle
blood flow and tissue motion are the sources of the ____ ____ doppler effect
for flow word the transducer,the doppler shift is ____ postive
for flow away from transducer, the doppler shift is ____ negative
do higher or lower frequencies produce larger doppler shifts? higher
The Doppler shift depends on the _____ of the doppler angle Cosine
The Doppler shift occurs at the interface of each _____ change Velocity
If the ------ speed increases the Doppler shift increases Scatterer and source
This is the difference between the emitted frequency and the echo frequency returning from moving scatterers Doppler shift
what is the best angle for imaging? 0 , biggest doppler shift
worst angle for doppler* imaging? 90, no doppler shift
Created by: lesterstoffels