- #1
j2dye
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Ultrasound reflected from an oncoming bloodstream that is moving at 31 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.)
I know that there are two doppler shifts; one where the source is fixed and the other where the observer is fixed.
So I'm supposed to use the doppler shift equation to solve for this:
f1=f((V + Vo) / (V - Vs))
but I don't know what numbers to plug into which variables.
After I find the frequency of the doppler shifted echo all I have to do is subtract it from the original frequency of 1.3 MHz, right?
I know that there are two doppler shifts; one where the source is fixed and the other where the observer is fixed.
So I'm supposed to use the doppler shift equation to solve for this:
f1=f((V + Vo) / (V - Vs))
but I don't know what numbers to plug into which variables.
After I find the frequency of the doppler shifted echo all I have to do is subtract it from the original frequency of 1.3 MHz, right?