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(Solution) - Doppler ultrasound is used to measure the speed of blood

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Doppler ultrasound is used to measure the speed of blood flow Problem 42.
In problem 42 Blood flow rates can be found by measuring the Doppler shift in frequency of ultrasound reflected by red blood cells (known as angiodynography). If the speed of the red blood cells is v, the speed of sound in blood is u, the ultrasound source emits waves of frequency f, and we assume that the blood cells are moving directly toward the ultrasound source, show that the frequency (r of reflected waves detected by the apparatus is given by

The reflected sound interferes with the emitted sound, producing beats. If the speed of red blood cells is 0.10 m/s, the ultrasound frequency used is 5.0 MHz, and the speed of sound in blood is 1570 m/s, what is the beat frequency?


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This question was answered on: Jul 11, 2017

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