Stethoscope Project

Stethoscope

Doctors use various complicated tools to monitor the health of patients. You can make a few of these tools like the stethoscope at home easily! Doctors use stethoscopes to listen to a patient’s heartbeat. In this project, you will learn to make your own stethoscope. Once you build a stethoscope, you will be able to hear the difference between active and resting heartbeat as well as the difference between your heartbeat and the heartbeat of others in the house.

Aim:

To make a homemade Stethoscope.

Apparatus Required

  • A tubing piece
  • Scissors
  • A balloon
  • A timer
  • Rubber band

Procedure

  • Take a tubing and fit a funnel at both the ends.
  • Enlarge the balloon by blowing and then let the air out.
  • Cut top third of the balloon.
  • Stretch the top of the balloon tightly above the open end of any one of the funnels. You can use a band to hold it in the correct place.
  • Sit in a quiet place and keep the end of the funnel with a balloon on your chest, towards the left centre on the skin.
  • Keep the other funnel over the ear. You can hear a little beating sound.
  • Make use of the timer to count the number of beats you hear in 20 seconds. Multiply this value by three to calculate how much your heart beats in a minute.
  • Try doing more tests like running for 5 minutes and check how fast your heart beats.

The doctors listen to your heart beats for two seconds with a stethoscope. The first sound is a low pitched and longer sound while the second beat is higher and shorter sound.


Practise This Question

You are in outer space at point A and you are “falling” towards Jupiter. But lucky for you, you’re “falling” at a speed of ‘v’ which is higher than the escape velocity of Jupiter’s gravitational field at a distance ‘R’ as shown in the figure. Your prayers to the Old Gods and the New seem to be working because luck is on your side once again. You don’t fall directly onto the planet but go around it and away from it because of your escape velocity. When you reach point B, what is your speed(v’) ? (Assume the only force that acted on you is Jupiter’s gravitational pull. Also assume Jupiter is stationary.)