Calculating Beat Frequency in Ultrasound Reflection from Moving Bloodstream

AI Thread Summary
To calculate the beat frequency from ultrasound reflected off a moving bloodstream, first determine the Doppler-shifted frequency using the formula for the observed frequency based on the source and observer velocities. The original frequency is 1.3 MHz, and the bloodstream moves at 38 cm/s, with the speed of sound in blood being 1540 m/s. The observer's frequency can be calculated using the provided equations, resulting in a frequency that can then be subtracted from the original frequency to find the beat frequency. The discussion highlights the need to correctly apply the Doppler effect equations to solve for the reflected frequency before calculating the beat frequency. Accurate calculations will yield the final beat frequency.
cyberdx16
Messages
16
Reaction score
0

Homework Statement



Ultrasound reflected from an oncoming bloodstream that is moving at 38 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.)


Homework Equations



Fo=Fs(v+Vo/v)
Fb- (F2-f1)

The Attempt at a Solution



idk where to start...
 
Physics news on Phys.org
you are given the original freq... need to work out the reflected freq first... which would be doppler shifted due to moving source... I think you have got your two relevant equations written down.
 
so Fobserver is 1300000Hz, Vsource is .38m/s, and Vobserver is 1540 m/s?

so i would do 1300000=Fsource (345 + 1540/345-.38)

take this # and subtrack by 1300000?
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

What frequency does the blood receive? What frequency return
Replies
1
Views
2K
What is the Beat Frequency in Doppler Ultrasound Measurements?
Replies
1
Views
3K
Ultrasound waves and the kidney
Replies
4
Views
2K
Travelling towards a Canyon Wall: Calculating Beat Frequency
Replies
3
Views
2K
How do you find speed given the beat frequency?
Replies
3
Views
3K
Pulse repetition frequency ultrasound confusion
Replies
7
Views
3K
What is the beat frequence in Hz of ultrasound
Replies
2
Views
3K
Finding frequency of moving sources with beats
Replies
2
Views
3K
Beat frequency and velocity of observer
Replies
13
Views
4K
Blood flow velocity via Doppler effect
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top