1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Doppler Effect with heart motion

  1. Dec 9, 2008 #1
    1. The problem statement, all variables and given/known data
    Suppose a heart's ventricular wall moves in simple harmonic motion with amplitude 1.8mm and a frequency of 115 per minute. (a) Given a motion detector in contact with the chest produces sound at 2,000,000Hz which travels through tissue at 1.50 km/s. Find the maximum linear speed of the heart wall. (b) Find maximum frequency at which the sound arrvies at the heart. (c) Find the maximum frequency which at which sound is recieved by the motion detector.

    2. Relevant equations

    3. The attempt at a solution
    (a) 115=2,000,000((1.5+Vmax)/1.5)
    I am struggling with some of the concepts and where different terms can be applied, any suggestions? Do I need to convert any units?
  2. jcsd
  3. Dec 9, 2008 #2


    User Avatar
    Homework Helper

    The wording of (a) is quite confusing, but I think that you don't need the info about the motion detector. (b) is ambiguous, but I would imagine you need to take into acount the doppler effect. You will have to think about (c) a bit.

    I don't think so.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Doppler Effect heart Date
Doppler Effect (2 moving objects) Mar 7, 2018
Doppler effect: calculate speed of a moving star Dec 23, 2017
Spring and Microphone (Doppler Effect..?) Dec 7, 2017
Doppler Effect Dec 7, 2017
Heart beat doppler effect Nov 5, 2007