- #1
vinny380
- 29
- 7
Dobbler Effect Question !
Question:
The Dobbler Effect, using ultrasonic waves of frequency of 2.25 *10^6 Hz is used to monitor the heartbeat of a fetus. A beat frequency of 500Hz is observed. Assuming the speed of sound is 1.54 *10^3 m/s, calculate the maximum velocity of the surface of the beating heart.
Equations:
Only one relevant equation:
f'=f((Vsound (+ or -) Vobserver)/(Vsound (- or t) Vsource))
Attempt
I know that the answer is .171m/s. I also know that in this questions, you have to use the above formula two times (double dobbler effect) to get the answer. If anyone can help me, I would really appreciate. I have pretty much tried plugging every number into the formula above, but everytime i do it, i never get .171m/s as my final answer! Maybe I am confusing whether the heart is the source of the observer. Please help! Thanks
Question:
The Dobbler Effect, using ultrasonic waves of frequency of 2.25 *10^6 Hz is used to monitor the heartbeat of a fetus. A beat frequency of 500Hz is observed. Assuming the speed of sound is 1.54 *10^3 m/s, calculate the maximum velocity of the surface of the beating heart.
Equations:
Only one relevant equation:
f'=f((Vsound (+ or -) Vobserver)/(Vsound (- or t) Vsource))
Attempt
I know that the answer is .171m/s. I also know that in this questions, you have to use the above formula two times (double dobbler effect) to get the answer. If anyone can help me, I would really appreciate. I have pretty much tried plugging every number into the formula above, but everytime i do it, i never get .171m/s as my final answer! Maybe I am confusing whether the heart is the source of the observer. Please help! Thanks