Stethoscopes are used to listen to a person’s heart. We can make a very basic stethoscope easily using just a cardboard tube, tape and a funnel.
How to make a stethoscope
What you need:
Kitchen roll tube
Gaffer tape/ Duct tape
First try using just the kitchen roll tube. Place on a friend’s and listen. Can you hear their heart beating?
Next tape the funnel into one end of the kitchen roll. Listen to a friend’s chest again, does it sound clearer?
Make a prediction – what do you think would happen to your heart rate if you did some star jumps? hint – will the heart have to beat faster?
Trying counting the number of beats before and after some exercise. Can you record this data on a chart?
How does a stethoscope work?
Stethoscopes used by doctors consist of a chest piece, rubber tubes and earpieces. The chest piece consists of a diaphragm and bell which amplify the sound of the heart beating so the doctor can hear it.
Download our FREE stethoscope experiment printable here:
How could you make the stethoscope better? What if you used a hose with a funnel at each end? Or different sized funnels? Which do you think would work the best?
Complements KS2 Science
Learning about the body, planning experiments and making predictions.
More human body science activities
Learn about the body with this fun collection of ideas, including making a model lung, drawing body parts and more.
Add some fun science activities to doctor role play games.