How to Make a Homemade Stethoscope

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Stethoscopes, used by all doctors, amplify sound in order to easily hear heartbeats, determine fluid in lungs, and more. Elementary school students studying the body or how sound travels can make their own stethoscopes.

  • Small hose
  • Large funnel
  • Small funnel
  • Electrical tape
  • Strong scissors or a utility knife
  • Ruler
  • Permanent marker

1 Measure

Measure 15 inches of a garden hose by laying it against a ruler on a flat surface. Mark the hose at both ends with a permanent marker.

2 Using scissors or a utility knife

Using scissors or a utility knife, cut the hose as marked.

3 Push the small end

Push the small end of a small funnel into one end of the hose.

4 Wrap

Wrap with electrical tape to keep the funnel in place.

5 Place the large

Place the large funnel into the other end of the hose. Tape this into place with the electrical tape.

6 Press the wider end

Press the wider end of the large funnel against a friend's chest and place the small funnel in your ear. Listen to and count the heartbeats you hear in one minute.

7 Ask your friend

Ask your friend to do some jumping jacks. Listen to the heartbeat again and count the beats you now hear in one minute. Compare the two sets of data.

Alicia Bodine has been a professional writer for 13 years. She has produced thousands of articles for online publications such as Demand Studios, GoBankingRates and WiseGeek. Bodine is passionate about gardening, travel, education and finance. She has received awards for being a top content producer.