## Blood

Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.)

Beat Frequency in Hz =
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 Quote by confused1 Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat Frequency in Hz =
This exact question appeared recently and there were some responses to it. Maybe you can find it and if need be continue the discussion there.

 Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.)
It is called what what effect(I don't know how to say it in english)

The frequency the blood receive isf1=f(sound)*(V(sound)+V(blood))/V(sound)

The frequency blood reflect and mixed with the original Ultrasound is
f2=f1*V(sound)/( (V(sound)-V(blood))

So f2=f(sound)*(V(sound)+V(blood))/(V(sound)-V(blood)) ,you caculate it yourself.

And the f(beat)=|f2-f(sound)|.

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