What is the blood beat frequency?

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SUMMARY

The discussion focuses on calculating the blood beat frequency when ultrasound is reflected from a moving bloodstream. An original frequency of 2.5 MHz and a blood velocity of 30 cm/s are used in the calculations. The formula for the beat frequency is derived from the Doppler effect, specifically using the velocities of sound in blood (1540 m/s) and the bloodstream. The final beat frequency is determined by the absolute difference between the reflected frequency and the original frequency.

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confused1
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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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confused1 said:
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)|.

If you still have any questions,contact me at wangkehandsome@hotmail.com,Iwill be very glad to anwser it for you.
 

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