Asked by N.

A Doppler blood flow meter emits ultrasound at a frequency of 5.0 MHz. What is the beat frequency between the emitted waves and the waves reflected from blood cells moving away from the emitter at 0.15m/s? Assume that v_sound=1540m/s in blood.

Answers

Answered by drwls
The Doppler shift, delta f, of the blood cells moving away is 2 V/v_sound * 5.0 *10^6 Hz.
V = 0.15 m/s = the blood cell speed and v_sound = 1540 m/s.

The factor of 2 is there because the frequency is shifted twice (when received and when sent back).

delta f = 2*5*10^6*0.15/1540 = 974 Hz

The beat frequency (of the transmitted beam combined with the reflected beam)equals delta f
Answered by N.
thank you Drwls
Answered by lizz
thank you
Answered by Michael
perfect answer...thank you so much
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions